Battery type: polymer Working temperature: -5-+45 Battery capacity: 500mAh Color temperature: 4000K Charging time: 2/3 hours Product weight: about 60g Rated voltage: 5V Discharge time: 4/10 hours Product size: 35x18x112MM Rated power: 5W (4X0.5W/LED module) Light source: LED Rated current: IA Colour: A black Material:ABS Product instructions (1): Connect the USB cable to the power adapter or computer, and the other end to the product for charging for 10-20 minutes to activate the battery. The indicator light turn red when charging and turn off when fully . (2): Short To turn on the night light, short again to turn off the night light. (3): When the night light is on, short to adjust the brightness, 6 levels of brightness cycle. (4): When the night light is on and the battery level is below 10%, the night light flash every 5 minutes. Package Contents: 1 * Reading light 1 * Data cable Only the above package content, other products are not included. Note: Light reflection 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.