Function Feature
1) Transmission distance: 300m (free lane).
2) World Public Frequency 2.4G data Voice, image transmisssion.
3) Full-duplex hands-free call, clear audio and video.
4) Visiting key wake up call, standby power-saving sleep.
5) Unlock door and alarm function.
6) CE, RoHS, FCC available.
7) 83 effective communication channels. Frequency-hopping technology, super error-correcting capability, So the conversation is very stable.
8) Ultrashort built-in antenna design, fashionable outlook.
9) Super-infrared ninght vision video monitor capability.
10) Other optional function: Automatic image storage, photo taken function.

Indoor Monitor
1) Wireless frequency 2.4GHz
2) Power 5V battery rechargeable
3) Batterywork100h standby 5hours talk time
4) Size: 12.8cm*6.5cm*1.5cm
5) Transmission distance: 300m (free lane)
6) Portable handset

Outdoor Camera
1) Wireless frequency 2.4GHz
2) Power adapter 5V
3) Decoder: Built-in decoder
4) Size: L*W*H=12.5cm*9.3cm*3.5cm
5) Transmission distance: 300m (free lane)
6) Installation; Surface mount (86*86mm case)

Can work as below mathcing:
1 outdoor camera 1 indoor monitor
1 outdoor camera 2 indoor monitor
1 outdoor camera 3 indoor monitor
2 outdoor camera 1 indoor monitor
2 outdoor camera 2 indoor monitor

Accessory
Screw, rechargeable battery