Features: Wireless Belt-Pack Microphone System Single Channel, UHF Selectable Frequency Design Lab Tested Distortion-Free Pro Audio Performance USB Powered Microphone Receiver Base Simple Setup & Hassle-Free Operation Compact Tabletop Receiver Design Adjustable Volume Setting Convenient Desktop Audio Mic Control Receiver Base with Digital LCD Display Digital AF / RF Audio Signal Indicators & Frequency Readout Dual Antenna Extended Wireless Range for Crisp Vocal Pickup Integrated Low Noise Circuitry 1/4'' Unbalanced Audio Output Jack XLR (3-Pin) Balanced Audio Input Connector Power ON/OFF Control Used for Home, Office & Business Use What's in the Box: Microphone Receiver Base Belt-Pack Transmitter Headset Microphone Lavalier Microphone (2) ‘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 T. H. D: 0. 03% Sensitivity: -96dBm Construction Material: Engineered ABS Housing Power Consumption: USB Interface: Micro USB Battery Operated Belt-Pack, Requires (2) x 'AA' Batteries, Included Receiver Power Supply: USB, DC 5V Belt-Pack Dimensions (L x W x H): 3. 94'' x 2. 46'' x 0. 87'' -inches Receiver Base Dimensions (L x W x H): 8. 08'' x 6. 97'' x 1. 72'' -inches