This headlight is a variation of the HOPE Vision 1 LED bike light.
The VISION 1 LED uses a single high power led providing up to 240 lumens of light output on max power. The versatility of being able to accept any AA (LR6) size battery cell gives you the option of achieving extended burn times in an extremely small package. With a regulated drive circuit you will always get the same level of light output regardless of what battery cell you use.
Highly versatile, the light unit can be either mounted onto the head strap, bike handlebar mounts or bike helmet.