Transmitter

1.         4 frequency optional
2.         Audio & video monitoring
3.         Built-in rechargeable lithium battery
4.         Can place & hanging

Receiver

1.         4 frequency optional
2.         Compound MINI video output
3.         2.5 TFT screen
4.         Built-in speaker, with earphone
5.         Portable motion monitoring, distance without block: 100M