Decreasing Key +HOME:
Under the dormancy condition, firstly press the minus key and remains still, and press the HOME into calibration (The handle indicator flashes left and right).
Put the controller in a horizontal position, then press the + button and release it to start the handle calibration. The controller starts to calibrate.
When calibration is complete, all 4 LEDs light up for about 3 seconds and automatically go to sleep.