| Color | Black + Silver |
| Brand | RichFire |
| Model | SF-639 |
| Quantity | 1 Piece |
| Material | Aluminum alloy |
| Emitter Brand | Cree |
| LED Type | XM-L |
| Emitter BIN | T6 |
| Color BIN | Cool White |
| Number of Emitters | 1 |
| Working Voltage | 4.2 V |
| Power Supply | 2 x 18650 batteries |
| Current | 2.5 A |
| Theoretical Lumens | 800 lumens |
| Actual Lumens | 600-800 lumens |
| Runtime | 2-4 Hour |
| Number of Modes | 3 |
| Mode Arrangement | Hi、Low、Fast Strobe |
| Mode Memory | No |
| Switch Type | Reverse clicky |
| Switch Location | Tailcap |
| Lens | Glass |
| Reflector | Aluminum Smooth |
| Band Length | 50 cm |
| Compatible Circumference | 40-75 |
| Beam Range | 150 m |
| Other Features | Hard anodizing; Ultra brightness |
| Certification | CE |
| Packing List | 1 x Headlamp with strap 2 x 18650 Li-ion batteries 1 x 5V USB power cable (63-cm cable) 1 x English user manual |