About Rand/0
Rand/0 The Pocket Prophet is a smart e-ink device you can carry with you. With shake, dual-button, and NFC interactions, it gives everyday small questions a light nudge forward.
What is Rand/0
Rand/0 The Pocket Prophet is a smart e-ink device you can carry with you.
It is not a serious productivity tool. It is more like a small oracle slip in your pocket. When you get stuck on small questions like “what should I eat today,” “should I go out,” or “should I do this first,” shake it and let the little screen say something first.
The Book of Answers, dice, coin flip, random numbers, and quick decisions can all give you a lightweight result. It does not make the decision for you; it simply helps break the pause and gives you a direction to keep moving.
Current support scope
Rand/0 The Pocket Prophet currently cannot be bound to or used in the Dot App. It also does not support Dot services that are strongly tied to network connectivity, such as the API Open Platform.
If you need to write NFC cards, follow the NFC Cards guide.
What it can do
- Random decisions: Book of Answers, dice roll, coin flip, random numbers, and quick decisions;
- Daily companion: personality guide, wooden fish, custom lock screen, and other lightweight content;
- Daily hints: daily prompts, lucky colors, do/don't suggestions, and daily status;
- Calendar and time: always-on e-ink display to reduce the need to pick up your phone;
- Focus and timing: Clock, Timer, and Pomodoro;
- Practical tools: Bluetooth remote control, Display Mode, NFC card support, and a customizable home screen.
Technical Specifications of Rand/0
| Item | Specification |
|---|---|
| Model number | RDO-G01 |
| MCU | ESP32-C2 / ESP8684, 32-bit RISC-V single-core processor |
| Internal memory | 272 KB SRAM, 2 MB Flash |
| Display | 1.54-inch e-ink display 200 × 200 pixels Approx. 184 PPI 4-level grayscale supported |
| Panel material | Glass |
| Interactions | Two physical buttons (short/long press) Shake sensor Buzzer Passive NFC Instant lock screen image |
| Battery | 300 mAh Lithium-polymer battery |
| Rated input | 5V⎓0.5A |
| Charging time | Approx. 1 hour for a full charge |
| External interface | USB-C (charging) |
| Wireless connectivity | Wi-Fi: 2.4 GHz, IEEE 802.11b/g/n @ 20 MHz Bluetooth: Bluetooth LE 5.3 @ 2 Mbps PHY |
| RF specifications | RF frequency range: 2412–2484 MHz RF transmit power: ≤ 20 dBm (EIRP) |
| Dimensions | 53.5 × 42.3 × 11.7 mm |
| OTA updates | Supported |
RoHS / Hazardous Substance Restriction Information
The following information applies to Rand/0 The Pocket Prophet (model RDO-G01).
The number 10 represents the product's environmental-use period of 10 years under normal conditions. This period is not the product's safe service life or warranty period.
| Component | Lead (Pb) | Mercury (Hg) | Cadmium (Cd) | Hexavalent chromium [Cr(VI)] | Polybrominated biphenyls (PBB) | Polybrominated diphenyl ethers (PBDE) | Dibutyl phthalate (DBP) | Diisobutyl phthalate (DIBP) | Butyl benzyl phthalate (BBP) | Bis(2-ethylhexyl) phthalate (DEHP) |
|---|---|---|---|---|---|---|---|---|---|---|
| Printed circuit board assemblies and electronic components | × | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Display | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Battery pack | × | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Enclosure | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| Other parts | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | × | ○ |
Symbols
○: The concentration of the substance in all homogeneous materials of the part meets the limits specified by GB/T 26572.×: The concentration of the substance exceeds the limits specified by GB/T 26572 in at least one homogeneous material of the part.
This table is prepared according to SJ/T 11364—2024. At the end of the product's life, send it to a qualified recycling organization. Do not discard it with ordinary waste.
Use and Care
- The display uses glass; please protect it from impact and scratches.
- This product is for entertainment use only. It helps you explore yourself through playful interactions and does not constitute a professional assessment or value judgment.
- To improve display quality and reduce ghosting, the screen may occasionally perform a full refresh.
- When cleaning the product, avoid water ingress. Dirt on the product or screen surface can be wiped with a soft cloth moistened with a neutral detergent.
- Keep the device away from high temperature, high humidity, extreme cold, and other harsh environments.
- Do not immerse the product in water.
- Do not replace the battery yourself, as this may cause a fire hazard.
- When the low-battery prompt appears on the screen, charge it with USB Type-C as soon as possible.
- Device firmware can be updated from SETUP → System Version. You can view the current firmware version and battery percentage on the same page.
Notes
- E-ink displays are suitable for always-on, low-refresh content, not for frequent animation or rapidly changing visuals.
- Wi-Fi, Bluetooth, NFC, and shake interactions may be affected by the device system, network environment, and how the device is used.
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