DC output 12V for 12V fans
4 level output voltage, green light indication:
Level 4 output 12V
Level 3 output 10V
Level 2 output 8V
Level 1 output 6V
The white light indication for battery capacity
4 white lights 75~100% capacity
3 white lights 50~75% capacity
2 white lights 25~50% capacity
1 white light 0~25% capacity
USB 5V output for mobile phone charging
