Shure P3RA PSM 300 K3E, UHF In-ear receiver, Frequency range: K3E (606 - 630 MHz), Black metal housing, 3.5 mm Stereo jack output, Personal mix control using the MixMode function, Exceptionally wide stereo separation, Operates with 2x AA batteries up to 5.5 h or with optional SB900 rechargeable battery up 7 h