Please check all parts to ensure they are fully equipped. Connect the USB cable to a charger or computer when using for the first time. A red light on the base will illuminate when connected to power and remains on during charging, which takes approximately 3 hours to fully charge. To install the clamp, remove it from the base and secure the table clamp in the desired position where the tabletop thickness is less than or equal to 40mm. Adjust the lamp head to the preferred angle. The base features a touch-sensitive switch with PWM dimming function. A tap of less than 550ms turns the light on or off. Press and hold for more than 550ms to adjust brightness gradually; brightness increases or decreases while touching and stops when released. If held for more than 3 seconds, the brightness will cycle to maximum or minimum and remain constant until released. Model: -9006 Lamp Working Voltage: DC5V Light Source: 6 LED Rechargeable Battery: 400mAh Lithium Cell Power: 0.5W Luminance: 30 Lm Color Temperature: 6000K Source Life: 25000h Color: White Material: ABS Package Contents: 1 x LED Table Magnifier 1 x USB Cable 1 x Base Note: Lighting and display differences may cause slight variations in color between the image and actual item. Measurement allows an error of +/- 1-3 cm.