The sound from the DM-40D-BT speakers is interrupted, or unwanted noise can be heard when they're connected to a device via Bluetooth. Why?

The problem may be caused by one of the following:

1. An obstacle is blocking radio waves between the speakers and the Bluetooth device.
-> If there are walls etc. between the speakers and the device, communication will be affected. Move the speakers and the connected Bluetooth device close to each other so the sound isn't interrupted.

2. The load on the Bluetooth device is too heavy.
-> Close applications you're not using on the Bluetooth device to reduce load. If you use a Bluetooth device such as a smartphone, tablet, or laptop and it's running multiple applications, the load on the device will be heavy.

3. Electromagnetic waves from a microwave oven etc.
-> Do not use equipment such as a microwave oven, wireless LAN router, or cordless phone that generate electromagnetic waves in 2.4 GHz band near the speakers. If they're used nearby, they may interfere with Bluetooth communication.

4. The application you're using.
Depending on the app you're using, the sound may be cut off when you turn on/off the smartphone screen. If this happens, try another application or change the settings so the smartphone screen doesn't turn off.