Can one controller run two vibrating chips? | The maker offered a USB splitter cable [OK Prostate Chip]

This page is based on entries from "ok-lab's diary" (https://ok-lab.hatenablog.com/), the Japanese development diary written by Mr. Okada, founder of OK Lab, a small company in Japan (Okada Comfortable Life Laboratory). Only the entries about "twin vibrating chips and USB splitter cables" are summarized here, in order of publication. Past prices and sizes are as written at the time. Current prices come from the official product list (retrieved September 4, 2026). Quotations are translated from Japanese.

---

Note: This page is a personal reading log by someone with no connection to the maker or the seller. It reflects the source entries as of their publication dates and makes no guarantee of accuracy or safety. The product is not a medical device; talk to a doctor about any health decision. Check the official site for current information. This page contains advertising.

In short

• The maker's USB splitter cable supplied two vibrating chips from one controller, starting both together.
• Mr. Okada offered USB conversion, with charges depending on the equipment and whether the chip was newly purchased.
• The current list includes the plain motor chip and USB fitting option; historical twin configurations need separate confirmation.

---

About this product

The OK Prostate Chip is a small device that is placed in the urethra (the urine passage) so that it acts on the prostate; the maker sells it in several shapes, sizes and materials. It is made and sold by OK Lab (Okada Comfortable Life Laboratory), a small company in Japan, through its own online store, and prices are in Japanese yen (JPY). The maker's development diary, "ok-lab's diary", is written in Japanese. This page is an English summary of it, and every quotation is translated. OK Lab ships internationally, so readers outside Japan can order (see "Buying from outside Japan" below). Product names on this page are plain-English descriptions. The official Japanese product name is shown once in the product table so you can find the same item in the store.

---

Before you read: key terms

---

What happens: using two vibrating chips

The OK Prostate Chip is a device placed in the urethra, the urine passage, to act on the prostate. The vibrating versions contain motors, while a USB splitter cable (a branching electrical lead) supplies two units from one controller. The controller (the unit governing vibration) connects to the cable, which feeds both connected chips together. Mr. Okada discusses prostate-area use and a separate vibration unit for another body area, including nipples.

USB connections let the maker exchange each vibration head separately

An entry published in November 2019 describes a converted twin vibrator with egg-shaped and lip-shaped vibration heads. Its rechargeable controller offered 20 vibration modes, and either head could be replaced independently.

Mr. Okada also tried replacing both heads with vibrating chips, demonstrating a configuration containing two chip units. Because extensive custom connector work could become costly, he proposed investigating a lower-priced standard twin set.

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/30/164020

USB connection tests produced varying vibration strengths across several controllers

In the same entry published in November 2019, Mr. Okada compared several controllers during his prototype experiments. He described the usual 3V electronic controller as weaker than rechargeable models operating at 4.5V or above. A separate 4.5V controller also seemed slightly weaker than the rechargeable controller in his comparison.

His basic controller produced what he described as the strongest vibration at 6V; a 3V pink vibrator was listed but not tested. Mr. Okada excluded equipment with substantially different operating voltages from his proposed shared-controller approach.

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/30/164020

The USB splitter cable started both connected chips together

In an entry published in December 2019, Mr. Okada announced the splitter cable's launch with USB-A connectors (the connector type specified for this cable). The cable supplied both chips simultaneously; the single-chip configuration described in the entry had one USB branch disconnected.

Its launch price was ¥1,500 (about $10 at ¥156 = $1, rate as of 2026-09-04) tax excluded, based on 3 USB connectors priced at ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) tax excluded each. For contrasting vibration, Mr. Okada suggested pairing a 10mm motor with an 8mm motor.

(Source: ok-lab's diary, published December 2019)
https://ok-lab.hatenablog.com/entry/2019/12/07/162608

A USB connection charge prompted a refund for a new chip

In an entry published in January 2020, a customer ordered a plain motor chip (the motor-only vibration unit) and a twin splitter cable. The customer had also paid for a USB fitting on the new chip.

Mr. Okada replied that replacing the new chip's battery connection with USB carried no charge, and announced a ¥550 (about $4 at ¥156 = $1, rate as of 2026-09-04) refund through PayPal, an online payment service. The diary does not record whether the refund was completed or how this customer's twin arrangement performed. Mr. Okada's reply identified the new chip's connector charge as the unnecessary purchase.

(Source: ok-lab's diary, published January 2020)
https://ok-lab.hatenablog.com/entry/2020/01/11/151714

---

The maker's answer to using two vibrating chips

Mr. Okada offered USB connections and branching, with different charges for new chips, existing equipment and products supplied by customers.

USB connection charges were lower than miniature plug charges

In an entry published in November 2019, USB fitting on the company's own cables cost ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) tax excluded per connector. A male-and-female connector pair cost ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) tax excluded.

A miniature plug (the smaller cable connector discussed in the entry) cost ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) tax excluded each, making the stated USB connector price half as much. Mr. Okada attributed the difference to the additional resin work required for miniature plugs. He therefore recommended USB connections in place of miniature plugs.

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/30/164020

A new USB connection came without the standard controller

The entry published in November 2019 distinguished new purchases from conversions of chips customers already owned. A newly purchased vibrating chip could have a USB connector fitted without a connection fee, but its standard controller was omitted. The same specification on a new plain motor chip excluded the battery box.

Converting an existing vibrating chip cost ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) tax excluded for the male-and-female connector pair. Fitting USB to the electronic-controller option carried an additional ¥500 (about $3 at ¥156 = $1, rate as of 2026-09-04) tax-excluded charge. Mr. Okada asked customers requesting the new-chip specification to identify it in their order message.

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/30/164020

Outside products carried higher USB connection charges and connection concerns

In the entry published in November 2019, USB fitting on another manufacturer's vibrator cost ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04) tax excluded per connector. That rate also covered customer-supplied vibrators sent to the company, with Mr. Okada citing differences in cable construction.

Mr. Okada reported finding connection faults quite frequently when dismantling controllers. Customer-supplied controllers received cable connection work without the reinforcement included in the company's own electronic-controller option. He suggested supplying an electronic controller as a potentially cheaper alternative to buying that option, while explaining this difference in service.

(Source: ok-lab's diary, published November 2019)
https://ok-lab.hatenablog.com/entry/2019/11/30/164020

The twin-motor prototype increased output while retaining nearly the same width

In an entry published in December 2021, Mr. Okada introduced a twin-motor prototype (an experimental chip intended to increase vibration). He reported nearly the same width as the plain motor chip and twice its vibration. The entry priced the plain motor chip at ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) tax excluded and the twin prototype at ¥6,000 (about $38 at ¥156 = $1, rate as of 2026-09-04) tax excluded.

Mr. Okada explained that smartphone control could reduce vibration almost to zero. For that form of control, he proposed the higher maximum output to provide additional range.

(Source: ok-lab's diary, published December 2021)
https://ok-lab.hatenablog.com/entry/2021/12/25/123556

---

How using two vibrating chips changed over time

The diary does not say what the current state is.

---

OK Prostate Chip products related to using two vibrating chips

The current product list prices the plain motor chip and USB connector fitting separately.

Products that appear in these entries

The plain motor chip is listed in OK Lab's own online store.

The USB connector fitting option is listed in OK Lab's own online store.

(Source: ok-lab's diary, published January 2020)
https://ok-lab.hatenablog.com/entry/2020/01/11/151714

Products the diary mentioned as alternatives

The diary names no alternative.

For the historical twin splitter cable, converted twin-controller prototype, custom short resin build and twin-motor prototype: No matching product can be confirmed on the current list.

---

Common worries about using two vibrating chips

The customer questions concern conversion charges, the distinction between chip designs, and whether one controller connection can supply two units.

"Can an outside controller receive a USB connection?"

In an entry published in January 2020, a customer asked about converting a purchased 6V controller with 10 vibration modes. Mr. Okada quoted ¥1,100 (about $7 at ¥156 = $1, rate as of 2026-09-04) per end for 2 ends, giving ¥2,200 (about $14 at ¥156 = $1, rate as of 2026-09-04), plus a ¥400 (about $3 at ¥156 = $1, rate as of 2026-09-04) handling fee.

He also reported testing that controller, describing vibration comparable to roughly 6V operation at maximum and 3V at reduced output. The diary does not record this customer's later experience with the converted controller. Mr. Okada offered to accept the controller for the quoted conversion service.

(Source: ok-lab's diary, published January 2020)
https://ok-lab.hatenablog.com/entry/2020/01/11/151714

"Is a new chip's USB connection free?"

In an entry published in January 2020, a customer asked this while requesting a custom short resin chip with a motor and screw-shaped support. Mr. Okada confirmed free USB fitting on a new chip, while explaining that converting an existing chip remained chargeable. He also clarified that the requested resin-bodied design differed from the motor-only product.

The quoted custom resin chip cost ¥4,000 (about $26 at ¥156 = $1, rate as of 2026-09-04) tax excluded, with the support adding ¥3,000 (about $19 at ¥156 = $1, rate as of 2026-09-04) tax excluded; the resin body accounted for an additional ¥1,000 (about $6 at ¥156 = $1, rate as of 2026-09-04). The diary does not record whether this custom order was completed. Mr. Okada's reply directed the customer to the custom design's stated price, rather than the plain motor chip's price.

(Source: ok-lab's diary, published January 2020)
https://ok-lab.hatenablog.com/entry/2020/01/25/150127

"Can one USB connection power two plain motor chips?"

In an entry published in November 2021, a customer requested simultaneous vibration from two plain motor chips for external nipple stimulation. The request specified one USB-A socket (the receiving connector on the controller connection). Mr. Okada confirmed that this was possible with an additional USB branching part.

He described repeated branching as theoretically allowing any number of chips, while cable bulk limited each individual splitter to two branches. The diary does not record a completed system or a tested maximum number of chips for this request. Mr. Okada offered a quotation with the USB branching part as the only addition.

(Source: ok-lab's diary, published November 2021)
https://ok-lab.hatenablog.com/entry/2021/11/20/125643

---

Buying from outside Japan

OK Lab ships internationally to countries covered by Japan Post's EMS courier service. Overseas orders are paid in advance by PayPal. Each order carries a ¥400 (about $3 at ¥156 = $1, rate as of 2026-09-04) handling fee, and EMS shipping is charged on top. These terms come from OK Lab's official sales-terms page (written here as plain text, not a link: ok-lab.net/docs/law), checked on September 7, 2026; confirm them on the official store before you order, because they can change.

---

Summary of this article

---

Source: ok-lab's diary (Okada Comfortable Life Laboratory). The original entries are in Japanese; quotations on this page are translated. Photos and videos are on the original entries.