| Model | B31 |
| Quantity | 1 |
| Color | Black |
| Material | Aluminum alloy |
| Emitter Brand | Cree |
| LED Type | XM-L |
| Emitter BIN | T6 |
| Color BIN | Cool White |
| Number of Emitters | 3 |
| Working Voltage | 8.4 V |
| Battery Configuration | 4 x 18650 (4400mAh、 included) |
| Circuitry | 8.8A |
| Brightness | 1800~2500 lm |
| Runtime | 3 hours |
| Number of Modes | 3 |
| Mode Arrangement | Hi > Lo > Fast strobe |
| Mode Memory | No |
| Switch Type | Forward clicky |
| Switch Location | Tailcap |
| Lens | Glass |
| Reflector | Aluminum Smooth / SMO |
| Flashlight Mounting | Handlebar and helmet |
| Beam Range | 300m |
| Features | Color temperature: 5000K; Waterproof: IP6; When indicator lights on red and then automatically shut down、 please don't open the headlamp、 which will damage battery. |
| Packing List | 1 x Bicycle light (110cm-cable) |
| | 1 x 2-flat-pin plug power charger (100~240V / 100cm) |
| | 2 x Rubber rings |
| | 1 x Battery pack (15cm-cable) |
| | 1 x Battery case |