Un1que Doorbell U400 Pairing and No Sound or Signal issue Solution.

[@ullasn7295]

Just searched ur video was there problem solved in using new device thanks

[@mausumibhattacharya2079]

Thank you very much for your demo of u 400 doorbell

[@Mytube365Rahul]

Welcome Sir.

[@shivashiva-gy9tk]

Bro my receiver machine not working....... please tell solution

[@HariPrasad-vl2lt]

Can volume be decreased
?

[@Mytube365Rahul]

Yes by pressing the volume button