This Samson Stage 55 Wireless VHF Bodypack Microphone System features the SE10 headset microphone for unobtrusive, hands free speech during presentations, performances, and other public address applications. The system also consists of the SR55 VHF diversity receiver and ST5 bodypack transmitter. The SR55 receiver features VHF diversity reception which minimizes drop-out and RF (Radio Frequency) interference. Balanced XLR and unbalanced 1/4" phone outputs are provided on the rear, and the front panel features a power switch, volume knob, squelch control and signal LED metering. The lightweight ST5 bodypack features and 1/8" mini microphone input and is powered up to 10 hours on a single 9 volt battery. Features Features an SE10 headset microphone VHF diversity reception for minimal drop-out and interference ST5 transmitter is powered up to 10 hours on a single 9V battery Specifications System Type of System: Single Channel VHF Diversity Headset System RF Carrier Frequency Range: Channel 18 / 174.5 MHz Approx. Working Range: 300ft Overall Frequency Response: 40Hz to 15kHz +/- 3dB Signal-to-Noise Ratio: > 100 dB # Of Channels: Single frequency system, available in 25 different frequencies # Of Simultaneous Systems: 10 Receiver Type of Receiver: SR55 Single Conversion Superheterodyne, Diversity Type of Outputs Balanced: 3-pin XLR male (+4dBm, 600 Ohm) Unbalanced: 1/4" Phone (-10dBm, 5k Ohm) Headphone Monitoring: No Power Requirements: 12 Volts DC, 100mA typical (110 mA max.), AC adapter supplied Battery Type/Approx. Life: AC power only, not applicable Display LED Indicators: Antenna A or B: 2 LEDs AF Level: 6 LEDs RF Level: 6 LEDs Mounting Options: Flat Surface or Half Rack Mountable Antenna Type: 1/4 wavelength x2 Dimensions (WxHxD): 8.5 x 1.75 x 4.6 (216 x 44 x 116mm) Weight: 100g (3.55oz) Transmitter Type of Transmitter: ST5 VHF Bodypack Transmitter Type of Input Connector: 1/8" (3.5mm) Locking Mini Connector Type of Microphone: SE10 Headset Polar Pattern: Omnidirectional Interchangeable Mic Heads: No Battery Type/Approx. Life: 9 Volt Alkaline: 6 hours typical Mute Switch: Audio On/Off (Mute Switch) Level Control: Yes, Trimpot Antenna Type: 1/4 wavelength telescopic Display: No Dimensions (WxHxD): 2.6 x .87 x 4" (65 x 22 x 100mm) Weight: 0.75 lb (20g)