This device comply with rulers and regulations related to FCC, CE, CCC
Outdoor-bell is power supplied by 4pcs alkaline battery, easy to replace the battery, indoor-bell is power supplied by rechargeable Li-ion battery.
Low power consumption, long standby time for outdoor-bell up to six months
Big and adjustable speaker, clear voice, can be used as mobile interphone.
Long wireless distance up to 300M
Easily installed with 3M tape on the wall
Outdoor-bell pair with indoor-bell by learning its code, 1 outdoor-bell can paired with N indoor-bells and no interference each other.
Small and beautiful, size: 100*60*14.8mm