Instruction 1.Take out of the little plastic which is isolation if the battery was installed into the headlamp. 2.Charge the battery first for 3-4 hours. The indicator of charger blinks red and green or just blinks red when the battery is in charge. The indicator of charger turns to green when the battery is in full charge. 3.Install the battery into the headlamp. Put the negative pole (anode)in the side without spring, that means put the positive pole (cathode) touching the spring. 4.Cover the lid back. Hardly press the button beside the head to turn it on. 5.Press the button lightly to change the modes.There are 3 modes (Bright-Dim-SOS)with this headlight 6.Zoom the head to change the shape of light. Specifications Model of Led:  Led Body Material: Alumiun alloy Focus: Stretching to adjust its focus Distance: 100 meters Modes: 3 modes ,Bright / Dim / SOS  Power supply: 2 x Battery(Included) Net Weight: 290g/10.23oz Waterproofing design, but don't deep it into water. Package Includes 1/2/3 x  LED Headlamp 2/4/6 x Battery 1/2/3 x Wall Charger 1/2/3 x Car Charger Type