NO. SP01-16PA Instruction Button switch : Ist step for strong light 2nd step for weak light 3rd step for flash light 4nd step for bottom light Rechargeable Built-in Battery 3.7V, 2400mAh, Li-ion battery 500 recycle times LED Type Luminous flux: 3801m + 150lm Life-span: 50000hrs Recharging Time 5V/300mA adapter : 8hrs Rated Voltage DC 5V Operating Time Front light : 2.5-11hrs Bottom light : 8.5-9.5hrs Operating Temperature 0~40°C Charging Indicator Being charged: Red Fully charged: Red light OFF