Detailed Product Descriptiondoorbell: Super bright LED digital tube display hotel room number, smart settingSmart touch-screen ding-dong doorbell triggedoorbell with do not disturb for hotel   specification of  doorbell with do not disturb for hotel   Case Material: Imported fireproof PC plasticShell color: Senior ivory, silver-plated frameOperating Voltage: AC 180V ~ 250V (other voltages can be customized)Dimension: length 85 * W 85 *high 41 (mm) Features: Super bright LED digital tube display hotel room number, room number, smart setting, tamper with them. (Change of method see the product installation, the product side to take off the shell can be seen set methods);Smart touch-screen ding-dong doorbell trigger;Do not disturb doorbell trigger self-locking; (Do Not Disturb lights, server is locked on its own touch-screen bell triggering)Please clean When guests want to clean the room, in the room by pressing the "Please clean up" switch, the door with a clean logo signs  in the light Always, waiters will see a prompt that is timely and clean rooms; when the guests want to rest or engage in other activities when you do not want to be disturbed, just in the room by pressing the "Do Not Disturb" switch, the door signs not to interference with the logo lights Chang Liang, suggesting that other people do not disturb, this time even if the press the doorbell switch, the room inside the bell will not ring.Because it is the instantaneous burst-ding-dong doorbell device, can not long hold down the touch screen to trigger the ding-dong doorbell, so need to jog touch screen to trigger the doorbell  CE Certificates for hotel doorbell    doorbell for hotel use with do not disturb and room number function