Serene Central Alert Smoke and Fire Alarm with Audio Alarm Transmitter

The Central Alert Audio Transmitter CA-AX, detects the audio alarm of the smoke detector and sends a wireless signal to compatible
Central Alert notification units CA-360, CA-380, CA-PX, and CA-RX to alert you.

Features:

• UL listed, smoke and CO detector with sealed in 10 year lithium battery
• Wireless transmitter detects T3, T4, and traditional alarm sounds
• Range: up to 200 ft in open space
• Backup battery functions for at least 7 days