1000ft Signal Range Wireless Doorbell IP54 48 Ringtones Volume Memory Black
This wireless doorbell provides a 1000 ft/300 m range, 48 ringtones, silent mode with an LED indicator. Silent Mode: In silent mode, this doorbell for classroom doesn’t make a sound.
SadoTech Wireless Door or Window Sensor & Receiver Plus Chime White NOB
This isn’t a doorbell but a chime that rings when someone opens a window or door please see the video. SadoTech Wireless Door or Window Sensor & Receiver Plus Chime White NOB. Shipped with USPS Ground Advantage.