Toggle the mode switch to select the mode you want to use.
PC mode: Toggle the switch to the top. The BTR15 will enter the USB decoding mode for desktop devices, and can be powered through USB.
BT mode: Toggle the switch to the middle. The BTR15 will enter the Bluetooth receiving mode, and can be powered through USB.
PHONE mode: Toggle the mode switch to the bottom. The BTR15 will enter the decoding mode for mobile phones, and will be disabled from USB charging (The device will be forced to charge if it is powered off for low battery).
