DETAILSFeatures: Wireless Belt-Pack Microphone System 2-Channel, UHF Selectable Frequency Design USB Powered Microphone Receiver Base Simple Setup & Hassle-Free Operation Compact Tabletop Receiver Design Adjustable Volume Setting Convenient Desktop Fold-out Stand Body-Packs with Digital LCD Display Integrated Low Noise Circuitry Lab Tested Distortion-Free Audio Performance Extended Wireless Range with Crisp Vocal Pickup 1/4’’ Unbalanced Audio Output Jack AF and RF Audio Signal Indicators Power ON/OFF Control Used for Home, Office & Business Use What's in the Box: Microphone Receiver Base (2) Belt-Pack Transmitters (2) Headset Microphones (2) Lavalier Microphones (4) ‘AA’ Batteries USB Cable Technical Specs: Wireless Mic System Type: UHF (Ultra High Frequency) Band Selectable Channel Frequency: 16 Channels Wireless Operation Range: Up to 165’ ft. Image & Spurious Rejection: >70 dB Audio Output Level: +/- 300 mV Output Impedance: 600 Ohm Frequency Stability: +/- 0.005% T.H.D: 0.03% Sensitivity: -96dBm Construction Material: Engineered ABS Housing Battery Operated Belt-Pack, Requires (2) x 'AA' Batteries (Each), Included Power Consumption: