Wireless audio intercom, #RL-0518
- - 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.
- - Expandable: up to 3 indoor units.
