Rechargeable L.E.D Head Lamp 120 Lumen. Featuring a unique detachable lamp with integrated magnet for increased user applications, the 71424 is incredibly versatile. Providing up to 5 hours operating time, the head lamp is rechargeable via USB lead and comes with a 240V adaptor. The 71424 is also equipped with a brightness memory function. Simply leave the lamp on for 5 seconds and it will remember the brightness setting for the next use.