1.Please check all the parts if fully equipped. 2.Please connect the USB cord with charger or computer when first time use. 3.There is a red light on the base, it will on when connects electricity power, about 3h to be charging full. 4.If you want to use the clamp, please release it from the base and fix the table clamp on the suitable position,where the plywood thickness requires less than equal40MM, rotating the lamp body to the best position. 5.There is touchable switch on the base, it includes PWM dimmer, clicking it less than 550ms, which can control the light on and off. Touching it more than 550ms, this can control the PWM dimmer. Keep on touching, the brightness will be increased or decreased gradually. The brightness will stop changing when released. If touching more than 3S, the brightness will be up to the brightest or the darkest and no changing, so the cycle to repeat. Lamp working voltage: DC5V Light: 15LED Rechargeable battery: 400mAh Lithium Cell Power: 0.5W Luminance: 30Lm Colour Temperature: 6000K Source life: 25000h Material:alloy colour:white Package Contents: 1 * LED Table Magnifier 1 * USB Cable 1 * Bottom seat Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.