| Brand | SingFire |
| Model | SF-551B |
| Quantity | 1 |
| Color | Black + silver |
| Material | Aluminum alloy |
| Emitter Brand | Cree |
| LED Type | XM-L |
| Emitter BIN | T6 |
| Color BIN | Neutral White |
| Number of Emitters | 1 |
| Working Voltage | 4.2 V |
| Battery Configuration | 2 x 18650 batteries (included) |
| Circuitry | 2500mA |
| Brightness | 800 lm |
| Runtime | 2~5 hours |
| Number of Modes | 3 |
| Mode Arrangement | Hi > Low > Fast Strobe |
| Mode Memory | No |
| Switch Type | Reverse clicky |
| Switch Location | Bezel |
| Lens | Plastic |
| Reflector | No |
| Strap Included | No |
| Clip Included | No |
| Band Length | 40cm |
| Suitable Head Circumference | 30~60cm |
| Beam Range | 200~500 meters |
| Other Feature | Zoom-to-throw; Great for night walking、 and other outdoor activities、 such as fishing、 hunting etc.; Modes and function: 1. high light 100%、 2. low light 50%、 3. strobe (10Hz); Three modes a circle、 long press can enter police strobe in any mode |
| Certification | CE / RoHS |
| Packing List | 1 x Headlamp 2 x 18650 rechargeable batteries 1 x AC power charger adapter (Input: AC100~240V / 50~60Hz; Output: DC 4.2V/ 5 00mA; 2-flat-pin plug、 95cm-cable) 1 x English user manual |