This product supports both Bluetooth wireless connection and wired connection to a PC. It can connect via Bluetooth to devices like smartphones or tablets, and also has wired connections including 2 × 3.5mm jack plugs and a USB-A plug for direct PC connection. Thus, you can use Bluetooth for other devices and a wired connection for your PC.
You just have to press the main button again (about 2 seconds) then it is switched off and or if headphone line would be attached somewhere it would also work simply press again. the sound takes place until a connection is established and this happens by the first 2 seconds press on the main button. the question on my part, in order to be able to help you properly, would be: More information i.e. why does this happen at all, you have to press it to establish a Bluetooth connection and thus the sound..... so for me it is quiet as long as it is red and you can still use the jack and set or establish the clinic connection in the receiver device. Otherwise it is also a good idea to take a USB power supply and connect it to the power and decide by pressing whether jack or Bluetooth