» 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 : W-101, W-508, W-510, W-515, W-530, IP-1500, HZ-350, SW-250, AF-5 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.