Shure P9RA PSM 900 P7, Wireless In Ear Reveiver, frequencyrange P7 (702 - 742 MHz), CueMOde to control upto 20 different InEar Mixes directly at the reciever, Audio Reference Combanding for powerful and clear InEar Sound, hard metall housing, audio frequencyrange 35 - 15.000 Hz, 20 frequencies parallel per frequency band, 3,5mm headphone jack output for earphones, display with Name, Frequency, channel, HF power, charging connections, works with 2x AA Batterie or SB900 Li-Ion rechargeable accus, 83 x 65 x 22mm Gewicht 200g, incl, 2x AA batteries