Once paired with the multi-alert receiver such as DCX-25 or DCX-800, the wireless wired door bell relay transmitter converts the existing wired door chime to a wireless door chime.
 

• Simple to connect with existing door chime with output relay
• Integrates the existing door chime into the wireless alert system
• SUB-1G RF frequency 868MHz or 915MHz
• Wireless transmission range up to 300m / 1,000ft (direct line of sight)
• Long battery life
• Compatible with the Multi-Alert receiver : MA-1000, DCX-900, DCX-800, DCX-25, DWA-800