Description:Two-way voice, not only a doorbell, but also a intercom system & walkie talkie

Outdoor unit is powered by 3xAA batteries (not included for shipment) with long standby time up to 4 months

Removable rechargeable indoor unit with adjustable volume (plug 5V 1A not included)

Super long working area up to 200Meters/656 ft (in open field)

Providing great convenience for your life

Specification:Material: PlasticOutdoor Unit: approx

6

9x6

8x2

6cm/2

72x2

68x1

02inchIndoor Unit: approx

10x5

4x2cm/3

94x2

12x0

79inchPackage Includes:1 Piece Talkback DoorbellNote:5V 1A plug for indoor unit is not included, you need to buy it by yourself