Long Range Radio Controls.  300 feet to 10 Miles  ( 100 m  to 16 km ) Field control operations, irrigation, lighting, marinas, parks, gates, remote power generators, solar systems, traffic, water pumps, remote monitoring, users can tailor long-distance links to their needs for remote monitoring, switching systems, security, remote control

1 Channel 4 Channel 2 Channel 4 Channel 1 Channel 4 Channel 16 Channel 1 Ch Base Transmitter 4 Ch Base Transmitter 2Ch Portable Transmitter 4Ch Portable Transmitter 1 Ch Base Receiver 4 Ch Base Receiver 16 Ch Base Receiver 937101 937104 937202 937204 937001 937004 937016

Combinations of Transmitter and Receivers can be mixed and matched to configure very sophisticated systems,
DIP switch programming 65,536 digital encoded 16 bits,  Heavy duty  Weather-resistant case