1. If the protective cover of phone or tablet device that contain metal, magnetic material will affect the transmission distance of Bluetooth. We suggest that you use the cover that we fore-mentioned.

2. If there are the numerous obstacle area between the cell phone or tablet device, it will weaken the signal.

3. When the transmitter side use the battery without charging , the Bluetooth stability will be subject to certain extent affect. If you find the disconnected to the terminal and the transmitter side, please check whether the transmitter power is too low.