Hisonic 4-Channel VHF Wireless Microphone System, HS8200 4-Channel Wireless System with Hi-Fi Handheld Microphones Long range high VHF transimission and receiving with minimal interference, up to 300 feet VHF system, 160.00 - 260.00 MHz professional frequency Multiple frequency available for easy system expansion Compatible Headset and Lapel Microphones can be purchased separately