Product Material: ABS+PS+Bellows+Electronic Components Product size about: 61.3x4x4CM (straightened) Roll up size about: 6.5x5.8x12.8CM Product weight: 195g Battery type: lithium battery Battery capacity: 1200mAh Rated power: 4W Rated voltage: 5V Rated current: 1A Cable length: 1m Charging time: product fully charged about 2 hours When charging, the indicator light is red; when fully charged, the indicator light is green. After fully charged, it can be used for about 3-48 hours (depending on the use of gear) Product operation 1. This product is a rechargeable desk lamp, using 5V / 1A power supply, please do not use more than 5V / 2A and greater than this power adapter for its charging or power supply. 2. Before using this product, please fully charge it. The indicator light is red when charging and green when fully charged. It takes about 2 hours to fully charge, and the maximum charging time is not more than 8 hours, so as not to damage the battery and shorten the product life. 3. This product can be used for about 3~48 hours with full charge according to different gears. 4. Switch key description: The first time you press the switch white light Press the switch for the second time Yellow light Press the switch for the third time Warm light Press the switch for the fourth time to switch off the light Infinitely dimming: In the case of light on, long press the switch key for two seconds to enter the infinite dimming mode, the light brightness will increase from the initial brightness to 100%, release the button, long press again for 2 seconds, the light will be from 100%-30%, and so on. (Light brightness with memory function, close and open again, the light brightness for the last time to adjust the brightness)