Features:
VHF fixed frequency wireless microphone system provides you with amazing sound quality and reliable performance adopting 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 equipment like Power amplifier, KTV room, DVD, Computer and Multimedia, ect. 
Four channel receiver, four 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 supports volume control and RF indicator.
With signal machine installation corner connectors, it's simple to operate.
It is suitable for KTV, family entertainment, outdoor concert, meeting and teaching ect.

Specifications: 
Frequency Range: VHF high frequency 175-270MHz
Frequency Stabilization: ±0.005% 
Frequency Accuracy: ±5KHz
Max Deviation: ±15KHz 
Modulation Mode: VHF
Frequency Response: 50Hz-15KHz
SNR: >=90db
Dynamic Range: 110db
Comprehensive Distortion: <=0.5%
Working Range: 100m (free space)
T.H.D: <0.1% (1KHz)
Audio Output Jack: (Ch1 / Ch2) XLR balanced +1/4" mixed
Power Voltage: AC110V-240V 50/60Hz
Mic Battery Operating Time: up to 6 hours (not included)
Microphone Size: Approx. 23.5 * 5.5 * 5.5cm / 9.25 * 2.17 * 2.17in
Microphone Weight: Approx. 221g / 7.82oz
Receiver Size: Approx. 47.9 * 18.1 * 4.3cm / 18.86 * 7.13 * 1.69in
Receiver Weight: Approx. 1559g / 54.99oz   
Package Size: Approx. 54 * 31 * 12.3cm / 21.25 * 12.20 * 4.84in        
Package Weight: Approx. 3585g / 126.94oz

Package List:
4 * Microphone
1 * Receiver
1 * Power Adapter (EU Plug)
1 * Audio Cable
1 * User Manual (English)