Saramonic UwMic9 TX9, Wireless Body-Pack Transmitter, Compatible with RX9 receiver, Frequency range: 514 - 596 MHz, 96 Selectable channels, Power display, Mute function, Easy-to-read LCD displays, Groups: A or B, Oscillator type: PLL synthesiser, Carrier frequencies: 514 - 596 MHz, Reference deviation: +/- 5 kHz (-60 dBV, 1,000 Hz input), Signal-to-noise ratio: 70 dB or more, Track suppression: -60 dB, Speech delay: 12 ms, Antenna: 1/4"" wire antenna, Reference audio input level: -60 dB (MIC input, 0 dB attenuation), Distortion: 0.5% or less, Frequency range: 40 to 18,000 Hz (+/- 3dB), Dimensions: 171 x 64 x 30 mm, Weight: 211 g (without batteries)