R1850DB

Please check the following points:
1) The power indicator light should be ON
2) Try to turn up the volume
3) Make sure the audio cables are correctly connected
4) Make sure you set the input correctly on the speakers 5) The audio source should deliver a signal output

Please check the below points:
1) Make sure your speaker is switched to Bluetooth mode. Disconnect any other devices from your speakers
2) Ensure the transmission range is within 10 meters
3) Try another Bluetooth device for connection

You can turn on the Edifier bookshelf speakers by one of the following methods:
1) Connect the main power of your speakers
2) Switch on the wall outlet of your speakers