·  Hotel special door bell-metal impacting sound(AC/DC).
·  Metal impacting double sound, the sound crisp & soft.
·  It can be connected with "Do Not Disturb Button".
·  It can be connected with AC220V AC voltage.
·  To prevent long-pressing the button, we have the circuit protection design.
·  To use the current and voltage instability, we have the automatic protection circuit.

Scope：

Guesthouse、Hotel、Office、Family、Commercial HousingEtc Etc.