Features:  VHF fixed frequency microphone system provides you with amazing sound quality and reliable performance adopting adopts high frequency 220-280MHz.   The wireless receiver system transfers sound without cable connection between the microphone and the stereo system.  It can be connected with different equipments like Power amplifier， KTV room， DVD， Computer and Multimedia，ect.   Dual channel receiver， two microphones can work at the same time.   Max Receive distance is 100 meters ( free space )  Metal stencil is drop-resistant and can eliminate POP noise with heat treatment technology.  It support volume control and RF indicator.  Lightness and portable is suitable for KTV， family entertainment， outdoor concert and meeting， teaching ect.  Specifications:   Frequency Range: VHF high frequency 220-280MHz  Frequency Stabilization: ±0.005%   Frequency Accuracy: ±5KHz  Max Deviation: ±15KHz   Modulation Mode: VHF  Frequency Response: 40Hz-16KHz  SNR: >=80db  Dynamic Range: >=90db  Comprehensive Distortion: <=0.5%  Working Range: 100m (free space)  Microphone Size: 23.5 * 5.5 * 5.5cm / 9.25 * 2.17 * 2.17in  Microphone Weight: 276g / 9.7oz  Receiver Size: 14 * 12.4 * 4.4cm / 5.51 * 4.88 * 1.73in  Receiver  Weight: 349g / 12.33oz   Package Size: Approx.1365g / 48.18oz                Package Weight: Approx. 36.7 * 27.7 * 6cm / 14.45 * 10.91 * 2.36in  Package List:  2 * Microphone  1 * Receiver  1 * Power Adapter (EU Plug)  1 * Audio Cable