Cable Length : 2 M Working Distance : Wireless, up to 50 M Connector : 5 Pin XLR For W-1 Wireless Transmitter, there are 2 radio frequencies can be chosen. They are 315MHz and 433MHz respectively. Compatible With : M-8 The M-31 Wireless Control Module, as its name suggests, adds wireless operation to your M Series machines. The M-31 delivers radio frequency technology you can depend on. You have the flexibility of wireless technology and the functionality you expect from Antari.