| Brand: | UltraFire |
| Model: | 501B |
| Material: | Aluminum alloy |
| Emitter Brand: | SSC |
| LED Type: | Z7 |
| Color: | Cool white |
| Number of Emitters: | 1 |
| Voltage Input: | 3.6~4.2V |
| Battery Configuration: | 1 x 18650 (not included) |
| Circuitry: | 2400mA |
| Brightness: | 620lm |
| Runtime: | 2 hours |
| Number of Modes: | 3 |
| Mode Arrangement: | Hi > Lo > Fast strobe |
| Mode Memory: | No |
| Switch Type: | Reverse clicky |
| Switch Location: | Tailcap |
| Lens: | Coated glass lens |
| Reflector: | Aluminum textured / OP |
| Strap Included: | Yes |
| Clip Included: | No |
| Beam Range: | 100 meters |
Dimensions: 5.28 in x 1.22 in x 1.22 in (13.4 cm x 3.1 cm x 3.1 cm)
Weight: 3.25 oz (92 g)