Wireless Intercom Call Button Doorbell compatible with Disabled Older Child Call

1. Wireless bidirectional call ringtone. (Industry first--focus) 2. Empty working distance of 80 meters, floor 1 to 3 floor 3. Working frequency 433MHz 4. Nominal use 5. Big button one-click call, easy operation compatible with the elderly Long working time, one charge can be about 40 days Built-in lithium battery, battery capacity 600 mA, recyclable High volume, maximum volume 105db Volume size can be adjusted, 5 gear adjustment Changeable ringtone, 38 songs Blue light when calling/ringing Low power flash red light indicator, full power bright blue light indicator Delivery of hanging rope, convenient compatible with the elderly Housing adopts plastic material, surface electroplating, gloss, high grade Small size: 79mmx42mmx13.5mm Color: Gray Material: plastic Package Contents: 2 * Buttons