Features: - 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. - Audio Frequency Response: 30-20kHz - Image & Spurious Rejection: >70 dB - Audio Output Level: +/- 300 mV - Output Impedance: 600 Ohm - Frequency Stability: +/- 0. 005% - Maximum Deviation: +/- 15 kHz - 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: