Black USB Lamp: DC 5V, 2A or more. USB desk lamp is very convenient, you can connect it to the adapter(included), laptop, pc, power bank. The USB lamp only works when connect power.No battery,no charging.3 Colors and 10 Intensities: 48 LED reading light with switch and cable. The light can be adjusted to 3 colors (cool/warm/neutral white) and 10 brightness to meet different needs. Dimmable reading lamp for children, black color.Lamp with Clamp and Arm: The 35cm arm can be bent 360 degrees, so it can be adjusted flexibly to always find the ideal position. The metal arm is easy to maintain its position. The lamp clip is very suitable for attaching to the edges of the bed, desk, table, etc. The clip can be opened for 3-5cm.Memory Function: When the power is connected continuously, the LED lamp will remember the final light settings. When you press the switch for 2 seconds, the LED lamp will automatically turn off after 1 minute. The dim blue light on the switch helped find the lamp in the dark.Application: This black clamp lamp with adapter is ideal for children's bed reading lamp, desk lamp, bed lamp, pc lamp, bedside lamp, manicure table lamp, beauty lamp, task lamp, etc.