Light Source: High Brightness Chip Type White LED x 1; Brightness (Approx.): 350 Lumens (High Mode), 160 Lumens (Mid Mode), 55 Lumens (Eco Mode), Brightness (Approx.): 5945 Candela (High Mode), 2751 Candela (Mid Mode), 875 Candela (Eco Mode). Batteries Used: Dedicated Lithium Polymer Rechargeable 3.7V 1100 2 x mAh or AA alkaline batteries; Charging time (approximate): 4 hours; Battery life: charge and discharge approximately 300 times; Lighting time (approximate): 3 hours (high mode), 5 hours (Mid mode), 10 hours (Eco mode); Irradiation distance (approx.): 59.8 ft (154 m) (maximum time). Protection grade: Dustproof, water resistant (IP66666 compliant). Drop endurance Dimensions (approximate): Diameter 1.8 x 6.3 inches (3.23 x 16.04 cm); Weight (Approx.): 5.3 oz (150 g) (including batteries); Accessories: Strap, Micro USB cable (19.7 inches (50 cm); Dedicated rechargeable battery.