Ultra-powerful headlamp, 3 regulated brightness levels, ACCU 2 ULTRA rechargeable battery Ultra high-output regulated lighting: - 350 lumens - constant lighting level, automatically switches to reserve power mode when battery pack is almost discharged - New generation power LEDs Comfortable and ergonomic: - excellent fit on the head: compact design, flexible stabilization plate and comfort foam, wide elastic headband and adjustable top strap - easy to use: choice of lighting level with intuitive dial Rechargeable high-performance batteries: - rechargeable 2000 mAh Lithium Ion battery offers large capacity and excellent performance at low temperatures, but remains as light as possible - test button for rechargeable battery with battery level indicator Reliable and durable: - lighting duration of 1h30 in maximum mode, plus 30 minutes in reserve power mode - durable construction and storm resistant (IP 66) - bulb does not need to be replaced - lamp and rechargeable batteries are guaranteed for 3 years Versatile: - three lighting levels: maximum, optimum, economic, to adapt the light to the situation - light body can be tilted vertically to change light direction - modular design adapts to the situation to maximize burn time or minimize the weight on the head, - attachment system allows quick removal of rechargeable battery pack in order to charge it or to replace it, and to reduce the weight carried on the head from 345 g (ACCU 2 ULTRA lamp + battery pack) to 200 g by disconnecting the battery pack from the headband by using the ULTRA Extension cord (optional E55950) - burn time is doubled with the high-output, large capacity ACCU 4 ULTRA rechargeable battery pack (optional E55400) - reflective sticker for battery pack.