1. To charge, attach the included micro-usb charger to the device. Make sure the unit is not dangling while charging.
2. A red LED will show on the battery while charging. After 1.5-2 hours, the device will be fully charged and the red LED will turn off.
3. To power on/off, click the power button 5 times rapidly.
4. To change voltage, Click the power button 3 times rapidly. There are 4 voltage setting on the device: 3.4 = Blue, 3.6 = Green, 3.8 = Yellow, 4.0 = Red.
5. Use the included magnetic component to attach the carts into the unit.