Working Distance : Wireless, up to 50 M  Function : Wireless ON/OFF  There are 2 radio frequencies can be chosen.They are 315MHz and 433MHz respectively.  Compatible With : AF-3, AF-5, F-1, HZ-350, IP-1500, M-4, SW-250, SW-300, W-101, W-510, W-508, W-515D, W-530D, W-715 & nbsp; Main Features: 1.Simple setting and operation : one click to register ; one click to go ; and one click to stop. 2. Interchangeability : A W-1 wireless radio transmitter is compatible with all Antari W series(signal receivers) 3. Modern metallic design honors your vision and professional