the t.bone free solo Twin HT 520 MHz, 2 channel UHF Wireless System with two dynamic handheld transmitter, cardioid, 10 groups with each 1 2Presets, 1 user channel, adjustable squelch with threshold meter on the receiver, frequencyscan in the receiver, adjustable AF out, adjustable HF power (5 mW, 10 mW, 20 mW), Infra Red transmitter to transfer the settings between receiver ad transmitter, pilottone, 25 kHz steps, 19" 1U housing with 2x BNC out for the antennas, XLR and Jack outs, works with 12V 1000mA DC powersupply (+ interior), dynamic handheld transmitter with metall housing, LCD Display, works with 2x AA Batteries or rechargeable batteries, frequencyrange 518 - 536 MHz, optional antenna converters: 177448 (not included), incl. plastic case and rackmount, optional microphone clamp 150793