Specifications: The light can Switch the color temperature of three segments, the brightness has no polar dimming; Maximum brightness: 50 lumens; Color temperature adjustable in three segments: 4500k - 3000k - 5500k; Power supply: 250mah ternary Lithium Polymer battery; Maximum brightness time: about 3-15 hours (varies with brightness), time charging time: about 40 minutes; The red indicator lights up while charging, and the full charge will automatically turn off. Instructions for use: With the lamp brightness memory function on, the default is the last brightness used, after 30 seconds on, press the switch can quickly turn off; Press the switch power supply to turn on the light, the default turn on light is 4500k neutral color temperature natural light color, then quickly press the power switch to cyclically switch the light color: 3000k warm light - - 5500k white light - - turn off the light; When any color lamp is on, long press the power switch to turn off the light; dimming, from the current brightness to 100% brightness, release the power switch and long press the power switch, the lamp brightness by 100% to 8%;< /p> Users can adjust the brightness according to their own needs.