Product Model: FS-MG4-BS
Channels:4
Model Type:  Car, Boat
Range: >150m (Ground distance without interference) 
Wireless protocol:  2A-BS
Battery:  6V DC/1.5AA*4  
RF: 2.4GHz ISM
Channel Resolution: 1024
Antenna Type:  Built-in single antenna
Dimensions :118mm*73mm*145mm
Weight: 130g