A 4 channel long range industrial remote control system supplied ready to go. Consisting of the rugged TAURUS-8T4 handset and miniature DIN rail receiver module, the SLIMDIN-8R4. 

Features:

Watchdog Option
Antenna Included
Transmitter - IP67
4 Channel RF receiver
868/915MHz versions available 
SMA antenna connection
LED signal strength indication
Momentary, Latching or timed outputs