There are 4 channels in one receiver, can supply 4 transmitters to use.

99 selectable frequencies in each channel.

It can use 4 receivers in the same place; it means 16 transmitters can be used at the same time. 

The front panel of the receiver is provided with a power supply indicator lamp and the signal    lamp which can reflect the working status clearly.

Using 4 card antennas for receiving. 

Using distance is 80 meters in the perfect place. 

Packaging List:
(1)   1 receiver
(2)   4 transmitters
(3)   1 singal cable
(4)   4 antennas
(5)   8 batteries (1.5V)
(6)   1 adaptor
(7)   1 manual