1. Fan: 3 speed settings
2. LED light: 2 brightness setings
3. Micro USB input: 5V 1A
4. With adjustable 160° fan head
5. With overcharge and over discharge protection function
6. The right indicator light, work blue
-green-cyan; the left indicator light, will turn red and flash when the battery is low, and will turn red when charging, will turn green after fully charged.