Clip-on book lamp with adjustable brightness, flexible and suitable for dormitories (white) Product material: ABS+PVC+electronic componentsProduct size approximately: 4.6x1.73x8CMPackaging size approximately: 4.9x2.5x8.3CMBattery model: polymer lithium battery Battery capacity: 400mAhRated power: 3W Rated voltage: 5VRated current: 1A Data cable length: 0.25mCharging time: It takes about 1.5 hours to fully charge the productWhen charging, the red light stays on, and when fully charged, the green light stays on.After fully charged, the low-brightness light can be used for about 24 hours, and the high-brightness light can be used for about 3-5 hours.1. On/off key: The first press turns on the cool white light, the second press turns on the warm yellow light, the third press turns on the warm white light, and the fourth press turns off the light.2. Stepless dimming: When the light is on, long press the button to adjust the light brightness. (The light has no memory function