Generic SW900
The SW900 is a color LCD display used in budget and mid-range e-bike conversion kits. It auto-detects system voltage (24V/36V/48V) and shows riding speed, battery level, PAS level, power output, temperature, trip distance, and odometer. Compatible with "No. 2 Protocol" (UART_NO2) sine-wave controllers — the same protocol used by S866, Brainpower, and Greentime generic controllers. Common inclusion in complete conversion kit bundles from sellers like CSC, NBPower, and similar.
In brief: E-bike display. Protocols: UART No.2 (S866/Brainpower). From $28 across 3 sellers.
Specs verified Jul 25, 2026
Where to Find
Prices tracked across 4 sellersAliExpress - Qxone Store
$27.58
Amazon - PABVZS
$32.71 + $7.00 shipping
Biktrix
$65.00
Amazon - mGYDY
Check seller for price* Shipping estimates are for the contiguous US and may vary by location.
Price History
Current best price $27.58. Over the past 90 days: low $18.01, high $65.00, average $40.73 — down 32% vs average.
- Biktrix
- AliExpress - Qxone Store
- Amazon - PABVZS
| Date | Price | Shipping | Total | Change | Coupon | Rating | Sales | In Stock | Status |
|---|---|---|---|---|---|---|---|---|---|
AliExpress - Qxone Store(15 records) | |||||||||
| Jun 3, 202601:22 AM | $27.58 | — | $27.58 | $9.46 | — | — | — | Yes | active |
| May 29, 202610:33 AM | $18.12 | — | $18.12 | $0.02 | — | — | — | Yes | active |
| May 28, 202609:01 AM | $18.10 | — | $18.10 | $0.01 | — | — | — | Yes | active |
| May 27, 202610:20 AM | $18.09 | — | $18.09 | $0.00 | — | — | — | Yes | active |
| May 25, 202601:55 PM | $18.09 | — | $18.09 | $0.05 | — | — | — | Yes | active |
| May 23, 202610:17 AM | $18.04 | — | $18.04 | $0.00 | — | — | — | Yes | active |
| May 22, 202609:02 AM | $18.04 | — | $18.04 | $0.02 | — | — | — | Yes | active |
| May 21, 202609:07 AM | $18.06 | — | $18.06 | $0.00 | — | — | — | Yes | active |
| May 19, 202609:09 AM | $18.06 | — | $18.06 | $0.05 | — | — | — | Yes | active |
| May 18, 202609:08 AM | $18.01 | — | $18.01 | $0.05 | — | — | — | Yes | active |
| May 15, 202609:01 AM | $18.06 | — | $18.06 | $0.02 | — | — | — | Yes | active |
| May 14, 202609:38 AM | $18.08 | — | $18.08 | $0.00 | — | — | — | Yes | active |
| May 14, 202609:07 AM | $18.08 | — | $18.08 | $0.01 | — | — | — | Yes | active |
| May 12, 202609:07 AM | $18.07 | — | $18.07 | $0.03 | — | — | — | Yes | active |
| May 10, 202610:28 AM | $18.04 | — | $18.04 | Initial | — | — | — | Yes | active |
Amazon - PABVZS(1 record) | |||||||||
| Jun 5, 202602:50 AM | $32.71 | $7.00 | $39.71 | Initial | — | — | — | Yes | active |
Biktrix(29 records) | |||||||||
| Jul 25, 202607:30 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jul 24, 202604:00 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jul 21, 202603:47 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jul 20, 202609:03 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jul 12, 202604:37 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | No | active |
| Jul 9, 202603:20 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jul 7, 202603:26 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jul 5, 202603:26 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jul 3, 202602:20 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jul 1, 202603:24 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 29, 202604:18 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 27, 202603:16 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 25, 202609:24 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 23, 202609:42 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 21, 202609:21 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 19, 202610:16 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 17, 202609:18 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 15, 202609:27 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 13, 202609:27 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 12, 202609:23 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 3, 202609:08 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| Jun 2, 202609:09 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| May 31, 202609:08 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| May 29, 202609:07 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| May 27, 202609:06 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| May 25, 202612:41 PM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| May 23, 202609:01 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| May 21, 202609:01 AM | $65.00 | — | $65.00 | $0.00 | — | — | — | Yes | active |
| May 19, 202609:01 AM | $65.00 | — | $65.00 | Initial | — | — | — | Yes | active |
Reviews
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Specifications
Specifications
- Protocols
- UART No.2 (S866/Brainpower)
- Light Control
- Yes
- Phone Charger
- No
- Bluetooth
- No
Physical
- Weight
- 138 g
Ports & Connectors
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | Battery + |
| 2 | Black | Ground |
| 3 | Blue | UART TX |
| 4 | Green | UART RX |
| 5 | Yellow | High Beam |
Comes With
Included in Kits
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