Feature:
1. Easy installation, stick directly to the wall with adhesive tape.
2. The outer bell is paired with the inner bell by learning its code, 1 outer bell can be paired with N inner bells and does not interfere with each other.
3. Made of high quality ABS plastic, exquisite and small, beautiful and high grade.

Specification:
Condition: 100% new
Item Type: Door Bell
Material: ABS plastic
Color: as pictures shown
Outdoor Bell:
Voltage range: 4 x AAA batteries (not included)
Working temperature: -20-55
Transmission distance: approx. 300 m/984.3 ft outdoor, 50 - 100 m/164 - 328.1 ft in obstacles
Working frequency: 467.6375MHZ
Working time: more than half a year
Waterproof level: no waterproof function
Inner bell:
Voltage range: 5V 1A
Working temperature: -20-55
Transmission distance: approx. 300 m/984.3 ft outdoor, 50 - 100 m/164 - 328.1 ft in obstacles
Working frequency: 467.6375MHZ
Waterproof level: no waterproof function

Package List:
1 x External doorbell 1 x Internal doorbell 1 x Screwdriver 1 x Manual2 x Sticker