Wireless Doorphone, Wireless Digital Intercom, Audio Doorphone

433MHz wireless audio intercom.
8 ringtones for option, 4 ringtone volume levels adjustable.
Lithium batteries on both the indoor and outdoor units can be charged alternatively through the USB port on the indoor unit.
Low battery indicator, battery charging status indicator.
433MHz Wireless unlock.
IP44 waterproof.
Easy installation.
Additional (up to 3) indoor units expandable.

What’s in the box
1 x Outdoor Unit
2 x Indoor Unit
1 x Chager Cbale
2 x Battery
1 x Manual