Features:
* UHF Band Frequency
* One XLR Balanced Output and One 1/4" Unbalanced Audio Output
* RF Input with Built-in RF Preamplifier to Improve S/N Ratio, Sensitivity and Dynamic    Range
* Low Noise Mixer Circuitry for Reducing interference
* Squelch Control at the Rear Panel
* Diversity Receiver for Optimal Reception
* Receiver Power Supply: 12V-18V DC
* Body-Pack Transmitter Low Battery LED Indicator
* Body-Pack Transmitter Battery: 9V Battery
* Body-Pack Transmitter Dimensions (W X H X D): 2.6” X 4.1” X 1.0”
* Receiver Dimensions (W X H X D): 8.5” X 1.6” X 5.4”
* Audio Frequency Response: 80 - 15,000Hz
* Frequency Stability: ± 0.005%
* Image and Spurious Rejection: 50 dB Minimum
* S/N Ratio: > 80 dB
* Operation Range: 300ft Outdoor, 150ft Indoor

AVL619 Profession Sweat-Proof Aerobic Headset Microphone with 3.5mm Lock Screw

* Element: Back Electret Condenser
* Polar Patte: Unidirectional
* Frequency: 100 Hz ~ 14,000Hz
* Impedance: 600Ω +/- 30% (@ 1KHz)
* Operating Volt: 1~10V DC Battery
* Sensitivity: -66 dB +/- 3 dB ( 0 dB=1V/ microbar 1,000 Hz indicated by open circuit )
* Connector: 3.5mm Lock Screw