Technical specifications:
Receiver Operating Voltage: AC 110V/220V
Power consumption of transmitter <10mW
Wireless Range: 1000 ft maximum (Open Space)
Internal Sounds: 60 Melody
IP44 weatherproof & dustproof casing for outdoor use
Volume range: 5 adjustable levels (0db to 110db)
Button working temperature: -7f to 140f
Suggestions:
1. Metal door will interfere with the signal and shorten the transmission range. If you install it on a metal door, please place the receiver a little closer to the transmitter.
2. Please place the receiver in areas away from refrigerator, microwave and other high-power appliances.
3. The transmitter is IP44 waterproof, but we recommend installing a waterproof cover for long-term use.