Specification:
Name: Self-Powered Wireless Doorbell
Doorbell Type: Wireless
Color: White
Receiver: AC 220V
Transmitter: No battery, Self-powered
Sound: 38 melodies
Remote control distance: outdoor 100m, indoor 30m
Radio frequency: 433.92MHz
Volume 4 Level with MAX 105dB
Waterproof: IPX7
Size: Diameter 67mm, Thickness 20mm

Package includes:
1 x Receiver
1 x Transmitter

• No battery is require so the jingle bell is even more safe and stable Lightweight, more attractive and compact
• Just needs you to press a built-in button called worm gear plane generator to produce power, energy harvesting technology, the new wireless bell requires a very tiny pressure only 350g
• The receiver features 4 levels of volume and has 38 songs to choose, Inside hidden LED design, funny to use
• Never be afraid of wet hands any more, safe to use always, the transmission distance between emitter and receiver is 100m
• The receiver has 3 relay functions, so the transmission distance can be expand to 300 meters

No battery is require so the jingle bell is even more safe and stable Lightweight, more attractive and compactAzisen