STI's Wireless Doorbell Button with 4-Channel Voice Receiver conveniently lets you know when a guest or customer is waiting. When the doorbell button is activated, it sends a wireless radio signal to the voice receiver. The receiver sounds a programmable voice message; select from 10 tones/tunes, 53 selectable words (speaks up to four words for each transmitter). 500-foot range (line of sight) and supervised for low battery and connection. Use up to four buttons with one receiver.
More Info: www.sti-usa.com/cd20