LD Systems U518 BPL, UHF Wireless System with Bodypack Transmitter, Lavalier microphone, Polar pattern: Cardioid, 9.5"" 1U True Diversity Receiver, Frequency band: 1785 - 1800 MHz, Frequency response: 30 to 16,000 Hz, 96 Channels in 8 groups a 12 channels, Switchable transmission power: 2, 10, 30 mW, Frequency scan in the receiver, Automatic frequency scan with infrared transmission of the setting from the receiver to the transmitter, Pilot tone, Bright OLED display, XLR and jack output, BNC antenna connections, Transmitter operation with 2 AA batteries or rechargeable batteries, Receiver operation with 12-18 V DC power supply, Includes 2 AA batteries, antennas, case and power supply