To turn on the flashlight, rotate it clockwise until you hear a click. To increase the brightness of the lamp and control the brightness, the lamp gives maximum brightness when the knob completes one circle of rotation. Follow the same procedure to decrease the lamp brightness and turn off the rechargeable lamp by rotating the ON/OFF switch with the brightness control knob counterclockwise until a clicking sound is heard.The lamp is equipped with an automatic lighting function or an emergency function during a power failure. When the light is on using DC power or the charging cord is connected to an AC power socket with mains power on, the light will not illuminate but instead charges the battery inside the unit and if the mains power is off. The lamp will light up, this is called the auto light functionTo charge the flashlight, unscrew the 220-240V round-pin wire provided along the plug. One end of the wire is into the battery charging receptacle on the unit and then plug the other end of the wire into any standard 220-240V AC power socket, turn the power "ON" that will charge the lampAttached to the DC power input port, when using DC charging, the power supply charger usage limit is 5V voltage, current 0.5A, and it costs about 6 hours to fully charge.There is a small red color indicator near the brightness control knob that indicates the charging status. Do not charge the unit for more than 10 hours at a time, once fully charged unplug the 220-240V round screw wire or solar panel and keep it in a safe place.Charge the rechargeable flashlight only in the "off" position, otherwise it will damage the SMD in the tube and affect the cycle life of the rechargeable battery.Avoid looking directly at the tube because it has a strong beam.There is one USB socket behind the brightness control knob for power which can be used to charge the rechargeable light.Note: If the rechargeable battery is completely dry, Le. If there is no power left, you cannot charge the unit with solar panels directly. j140SMD2 adjustable switches(3) Rotate 360°4) DC charge hole5 AC Charging Socket6 mini USB charge hole