?<strong>Features:</strong> <br> VHF fixed frequency wireless microphone system provides you with amazing sound quality and reliable performance adopting high frequency 220-280MHz. <br> The wireless receiver system transfers sound without cable connection between the microphone and the stereo system. <br> It can be connected with different equipment like Power amplifier£¬ KTV room£¬ DVD£¬ Computer and Multimedia£¬ ect.? <br> Four channel receiver£¬ four microphones can work at the same time.? <br> Max Receive distance is 100 meters ( free space ). <br> Metal stencil is drop-resistant and can eliminate POP noise with heat treatment technology. <br> It supports volume control and RF indicator. <br> With signal machine installation corner connectors£¬ it's simple to operate. <br> It is suitable for KTV£¬ family entertainment£¬ outdoor concert£¬ meeting and teaching ect. <br> <br> <strong>Specifications:</strong>? <br> Frequency Range: VHF high frequency 175-270MHz <br> Frequency Stabilization: ¡À0.005%? <br> Frequency Accuracy: ¡À5KHz <br> Max Deviation: ¡À15KHz? <br> Modulation Mode: VHF <br> Frequency Response: 50Hz-15KHz <br> SNR: &gt;=90db <br> Dynamic Range: 110db <br> Comprehensive Distortion: &lt;=0.5% <br> Working Range: 100m (free space) <br> T.H.D: &lt;0.1% (1KHz) <br> Audio Output Jack: (Ch1 / Ch2) XLR balanced +1/4" mixed <br> Power Voltage: AC110V-240V 50/60Hz <br> Mic Battery Operating Time: up to 6 hours (not included) <br> Microphone Size: Approx. 23.5 * 5.5 * 5.5cm / 9.25 * 2.17 * 2.17in <br> Microphone Weight: Approx. 221g / 7.82oz <br> Receiver Size: Approx. 47.9 * 18.1 * 4.3cm / 18.86 * 7.13 * 1.69in <br> Receiver Weight: Approx. 1559g / 54.99oz  ? <br> Package Size: Approx. 54 * 31 * 12.3cm / 21.25 * 12.20 * 4.84in ? ? ? ? <br> Package Weight: Approx. 3585g / 126.94oz <br> <br> <strong>Package List:</strong> <br> 4 * Microphone <br> 1 * Receiver <br> 1 * Power Adapter (EU Plug) <br> 1 * Audio Cable <br> 1 * User Manual (English)