MUSYSIC Professional Dual Channel VHF Lapel/Lavalier Wireless Microphone System 2 Channel Receiver (Metal Box) with 2 Lapel / Lavalier & Headset Microphones Individual volume controls on each Channel 1/4" audio unbalanced output Available Frequencies (Set 1: 186.20Mhz, 210.6Mhz),(Set 2: 192.6Mhz, 209.0Mhz),(Set 3: 276.4Mhz, 202.2Mhz),(Set 4: 180.4Mhz, 206.0Mhz) Battery Life: 12 Hours / AA Battery / Range 120 feet (40 Meters)