AKG PW45 Vocal Set - UHF wireless system, with Handheld transmitter, 4 Switchable frequencies in frequency range ISM 800,100 - 819,900 MHz, 9.5 inch Diversity-receiver with integrated antennas, adjustable output volume, XLR out, dynamic handheld transmitter with cardioid characteristics, operates with 1x AA battery or rechargeable battery, Low-Battery-Indicator, click free switch on handheld transmitter Including power adapter, stand adapter SA45 and 1x AA-Battery.