The signal may not be coming in clearly, making the connection unstable.
Move away from wireless devices such as access points, or appliances that product electromagnetic waves such as microwave ovens.
Try placing the connected Bluetooth device as close to this product as you can.
Devices with wireless network connectivity may transmit signals that obstruct Bluetooth communications. In this case, turn off the wireless network connectivity feature on your Bluetooth device.
YH-E500A