The light can switch three-stage color temperature, and the brightness is steplessly dimming;Three-stage adjustable temperature: 3000K-5500K-4500K;Power supply: 250MAH ternary polymer lithium battery;Brightness duration: about 3 hours, charging time: about 40 minutes;The red indicator light is on when charging, and it goes out automatically when fully charged.Instructions for use:With the function of turning on the brightness of the light, the default is the brightness used last time;Long press the power switch for 3 seconds to turn on the light, the default is 3000K warm yellow light color, then short press the power switch to cycle the light color: 5500K white light--4500K warm white-turn off the lights;When any lamp color is bright, long press the power switch to adjust the brightness, from the current brightness to 100% brightness, release the power switch and then long press the power switch, the brightness of the light is changed by100% to 15%;Users can adjust the brightness according to their needs.Note:1. Due to the light and screen difference, the item's colour may be slightly different from the pictures.2. Please allow 1-2cm differences due to manual measurement.3. Thanks for your understanding.