Note If the wireless range becomes short please replace the battery of call button.
Color: 2 Portable/Fixed Call Buttons Wireless nurse call button transmitter for patients, the disable, the elderly or pregnant, receiver is not included, they can press the button to get timely care when they need help. When you receive the button, you need to pair the button to the receiver then the button can work well with the receiver.
Features Battery: 23A 12V Alkaline battery included
Operating Range: 600+Feet in open area
Waterproof Frequency Range: 433MHZ
Frequency deiation: 0.5MHZ