The ERA-EXTX is a small wireless transmitter that wires into the existing wired doorbell in your home. When your wired doorbell is triggered, this small device sends an instant radio signal to a compatible ERA receiver, up to 4,000 ft. away. If you have trouble hearing the existing wired doorbell in your home, this will help you be notified when someone’s at the door.

Please note, the ERA-EXTX needs a compatible ERA receiver (sold separately) to work.

Features

• Up to 4,000 ft. wireless range
• Compatible with Safeguard Supply ERA series receivers
• Includes double-sided mounting tape & high-powered CR123A lithium battery
• Battery lasts 2-3 years before needing to be replaced