Room 01 · AI voice recorder · Open Vision Engineering, Inc.
Pocket,rebuilt.
A card-sized voice recorder that snaps to the back of a phone, records a room or a call in one press, and hands the audio to an app for transcripts.
The goal
A recorder the same size that captures a conversation and a phone call, keeps them on the device, and moves them to a phone over Bluetooth and Wi-Fi.
What is known.
Read on October 6, 2026. Every line says how it is known and where it comes from.
- Filed
- Read from a regulatory filing: test reports, labels and internal photos.
- Maker
- Stated by the maker on its own product page or manual.
- Reported
- Reported by the press or by a community project, not by the maker.
- Inferred
- Our reading of a photo or a document. Treat it as a lead, not a fact.
- Size
- 3.4 × 2.2 × 0.2 in, 52 g. Mounts on a MagSafe phone; an adhesive plate covers other phones.[1]
- Maker
- Radio
- 2.4 GHz Wi-Fi 6 (802.11b/g/n/ax) and Classic Bluetooth (79 channels, GFSK, π/4-DQPSK and 8DPSK), each tested with a 2.6 dBi chip antenna, 3.2 × 1.6 mm.[2][4][5]
- Filed
- Main chip
- A Telink TLSR9118: a RISC-V SoC with Wi-Fi 6, Bluetooth LE 5.4 and 802.15.4, legible on the V1.4 board.[6][7]
- Filed
- Second chip
- An LQFP marked “LX DSP885”, probably the audio and Classic Bluetooth processor: the TLSR9118 speaks Bluetooth LE only. Its part is not identified.[3][7]
- Inferred
- Memory
- 8 MB of SPI NOR flash (Winbond W25Q64JV). For recordings, the V1.2 board carries a 128 GB FORESEE FEMDNN128G eMMC; the V1.4 board a microSD socket holding a 64 GB card.[3][6]
- Filed
- Audio
- Two studio mics and one contact mic for phone calls, which the manual calls a vibration mic.[1][8]
- Maker
- Controls
- A side record button, a slider between call and in-person modes, a status LED and a vibration motor.[1][8]
- Maker
- Test pads
- Pads on the back of the board read DC5V, VBAT, GND, TX, RX, DM, DP, EN, 3.3V and GPIO3, 4, 19–22.[3]
- Filed
- Protocol
- Bluetooth commands are plain ASCII (APP& out, MCU& back); recordings are 16 kHz mono MP3 at 32 kbps.[9]
- Reported
Not published.
What nobody has said in public yet. Each one is a question the room answers by building.
- The schematics and block diagram. They were filed under long-term confidentiality.
- What the “LX DSP885” chip is, and what it does beside the TLSR9118.
- Whether the contact mic is a piezo pickup or a MEMS mic facing the phone.
Six milestones.
In order. Each one is reached when its last line is true of the board.
- 01
Power.
USB-C input, a charger sized for an 840 mAh cell, cell protection, a fuel gauge and the 3.3 V rail.
Done whenThe cell charges from 5 V, 1 A in about 1.5 hours and the gauge reports it.
- 02
Radio and brain.
One documented SoC with Wi-Fi and Bluetooth LE, and a chip antenna at an edge the metal case does not cover.
Done whenThe board pairs with a phone, and DRC and ERC are clean.
- 03
Audio.
Two MEMS mics for the room and a pickup for calls, captured at 16 kHz.
Done whenA conversation and a call each record to storage.
- 04
Storage and USB.
64 GB on the board, shown to a computer as a USB drive.
Done whenA recording copies off over USB-C.
- 05
Controls.
The side button, the mode slider, an RGB LED and a vibration motor.
Done whenEvery control does what the original's manual says it does.
- 06
Enclosure.
A 3.4 × 2.2 × 0.2 in shell with a magnet ring for MagSafe, built in the Product view.
Done whenThe board and cell fit and the packaging check is clean.
Room rules.
For everyone on the board. The board is shared, so most of them are about the others.
- Our own designThis room
- Pocket's terms forbid taking its hardware and firmware apart. This room works from the maker's page, the FCC filings, chip makers' pages and pocket-libre's independent protocol notes, and builds its own design. Nothing here is copied from Pocket's firmware.
- One board
- Everyone builds the same project. Don't duplicate it to work alone; work here, where the others can see it.
- Your own thread
- Talk to Inky in a chat thread of your own. A new message in a thread can stop the turn already running there.
- One long job at a time
- An autoroute or a long Inky turn holds the board. Tell the others before you start one.
- Undo is shared
- The board has one history for everyone. Pressing undo twice takes back a teammate's last edit, so look before you press.
- Inky runs on your account
- The board is shared; your usage is not. Each person's Inky turns count against their own plan.
- Public information only
- Work from what the maker published, regulatory filings and open references. No leaked documents, no copied firmware, no logos.
- The case needs a paid plan
- Every room's last milestone is built in the Product view, which comes with every paid plan and not with the trial. Members on the trial can do every other milestone.
Start from.
Open work that gets the room past a blank board. Check each licence before copying from it.
- pocket-libre, the decoded Bluetooth protocol (MIT)
The Bluetooth commands a phone client already speaks. Answering them is the stretch goal.
- FCC RBD-PKT02, internal photos (board V1.4)
The internal photos: the richest public look inside any of the four rooms' devices.
Sources
- [1]heypocket.com, product and specificationsheypocket.com
- [2]FCC RBD-PKT01, Wi-Fi test reportfccid.io
- [3]FCC RBD-PKT01, internal photos (board V1.2)fccid.io
- [4]FCC RBD-PKT01, Bluetooth test reportfccid.io
- [5]FCC RBD-PKT01, antenna specificationfccid.io
- [6]FCC RBD-PKT02, internal photos (board V1.4)fccid.io
- [7]Telink TLSR9118 product pagetelink-semi.com
- [8]FCC RBD-PKT01, user manualfccid.io
- [9]pocket-libre, the decoded Bluetooth protocol (MIT)github.com
See the device itself: heypocket.com.
Pocket, Persona, Friend and Game Boy are trademarks of their owners. heypcb is not affiliated with them and no endorsement is implied. Rooms build functionally equivalent devices from public information.