LD Systems U518 BPW, UHF Wireless System with Bodypack Transmitter, Wind instruments microphone, Directivity: Cardioid, 9.5"" 1U True Diversity Receiver, Frequency band: 1785 - 1800 MHz, Audio transmission range: 50 - 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