Ring Video Doorbell Two Way Audio HD Video Essential Wired Video Doorbell Best in Class Direct to WiFi No Hub Needed with Cutting Edge Features

Spec:
Item Type: Intercom Door Bell
Power: 0.5W
Channel: 1-16 Channel
Intercom Distance: Approx. 2000 meter / 6561.7ft
Number of Connection: Up to 16 sets without serial numbers, unlimited connection under the same channel number
Battery: 2 x 1800mAh Rechargeable Lithium Battery (built in, 1 battery per host)

How to Use:
Take out the product, install it and then use it.

PackageList:
1 x Internal Machine
1 x Charging Base
1 x External Machine
1 x External Machine Bracket
1 x USB Cable
1 x Double Sided Tape
1 x Door Bell Sticker
5 x Screws
3 x Expansion Pipes