| Brand | SingFire |
| Model | SF-539 |
| Quantity | 1 |
| Color | Black + red |
| Material | Aluminum alloys |
| Emitter Brand | Cree |
| LED Type | XM-L |
| Emitter BIN | T6 |
| Color BIN | Neutral White |
| Number of Emitters | 1 |
| Working Voltage | 8.4 V |
| Battery Configuration | 4 x 18650 Rechargeable li-ion battery |
| Circuitry | 2500mA |
| Brightness | 810 lm |
| Runtime | 4 hours |
| Number of Modes | 4 |
| Mode Arrangement | High / Middle / Low / Fast Strobe |
| Mode Memory | No |
| Switch Type | Full pressing |
| Switch Location | Tailcap |
| Lens | Glass |
| Reflector | No light cup |
| Flashlight Mounting | Handlebar and helmet |
| Beam Range | above 300m |
| Strap Included | No |
| Clip Included | No |
| Features | Zoom-to-throw; Water resistant / Surface anode under oxidation treatment; High light 100%、 middle light 50%、 low light 20%、 fast strobe (10Hz); Four modes recycle、 long press for about 3 seconds can shut down the light in any mode. |
| Certification | CE / RoHs |
| Keywords | Bicycle lamp / Headlamp |
| Packing List | 1 x Bicycle light (40cm-cable) |
| | 1 x Battery pack (30cm-cable) |
| | 1 x Charger (2-flat-pin plug / 110~240V / 110cm-cable) |
| | 1 x Headband (flexible) |
| | 2 x Rubber rings |
| | 1x English user manual |
| Brand | SingFire |
| Model | SF-539 |
| Quantity | 1 |
| Color | Black + red |
| Material | Aluminum alloys |
| Emitter Brand | Cree |
| LED Type | XM-L |
| Emitter BIN | T6 |
| Color BIN | Neutral White |
| Number of Emitters | 1 |
| Working Voltage | 8.4 V |
| Battery Configuration | 4 x 18650 Rechargeable li-ion battery |
| Circuitry | 2500mA |
| Brightness | 1000 lm |
| Runtime | 4 hours |
| Number of Modes | 4 |
| Mode Arrangement | High / Middle / Low / Fast Strobe |
| Mode Memory | No |
| Switch Type | Full pressing |
| Switch Location | Tailcap |
| Lens | Glass |
| Reflector | No light cup |
| Flashlight Mounting | Handlebar and helmet |
| Beam Range | above 300m |
| Strap Included | No |
| Clip Included | No |
| Features | Zoom-to-throw; Water resistant / Surface anode under oxidation treatment; High light 100%、 middle light 50%、 low light 20%、 fast strobe (10Hz); Four modes recycle、 long press for about 3 seconds can shut down the light in any mode. |
| Certification | CE / RoHs |
| Keywords | Bicycle lamp / Headlamp |
| Packing List | 1 x Bicycle light (40cm-cable) |
| ? | 1 x Battery pack (30cm-cable) |
| ? | 1 x Charger (2-flat-pin plug / 110~240V / 110cm-cable) |
| ? | 1 x Headlights (flexible) |
| ? | 2 x Rubber rings |
| ? | 1x English user manual |