Output 59 lumens. Advanced focus system - spot to flood. One-handed speed focus. Aircraft grade aluminium casing. Rear tail cap switch. Power transformation technology allows its single AA battery to produce 59 lumens. Burn time: up to 8 hours. Dimensions: 124 x 25 mm. Weight: 84 gms. Effective range: 0 - 305 feet. Power supply: 1 x AA alkaline batteries included.