The Azden's 300 Series are high quality dual and single channel UHF camera-mount wireless systems that feature 188 user-selectable frequencies displayed on an LCD screen to assure you of always finding a ?free? channel. The Azden 35XT is a plug-in transmitter for 300 Series systems, and will work with the 310UDR and 330UPR receivers. It connects to any microphone with a standard 3-pin XLR output, thereby allowing the user to turn their favorite handheld microphone into a wireless microphone. Works with both dynamic and condenser microphones with switchable 48V phantom power available. The 35XT operates on 2 AA batteries (not included). Features: - Make any dynamic microphone wireless - 188 Selectable UHF Frequencies - Locking ring connector - Digital LCD Display w/ Multi-function Readout - Powered by 2 ?AA? Batteries (not included) - Power & au.dio on/off switches - Switchable 48V phantom power - Internal output level adjustment What's in the box: 35XT transmitter Specifications: - Freq. Range UHF: 188 Selectable (566.125-589.875MHz) - Antenna: Internal - Connection: Locking female 3-pin XLR - Max. Input level: -16dBm - RF Power: 25mW - Input Impedance: 25k ohms - au.dio Adjust. Range: -65dBm to 46dBm - Phantom Power: 48V, switchable - Battery: 2 ?AA? Alkaline (2 x 1.5V) ? 6-8 hours runtime, 2 ?AA? rechargeable Ni-MH (2 x 1.2V) - Dimensions: 1.57?W x 1.57?H x 4.49?L (40 x 40 x 114 mm) - Weight: Approx. 6.35oz (180g) w/ battery