You are looking at a Dual Channel Wireless Microphone Systems. It will bring you into a world where you can sing happily and help you take off tireness and stress,feel freely immediately!Just at home,you can have fun with your family and friends together!Features:Professional and Intelligent Dual Wireless Microphone System,uses the VHF 220-270 MHz segment,avoid the interference frequencyWith dual volume controls and dual RF indicatorsIdeal for professional use at any events: Karaoke, sound source recording and amplifying, vocal concerts, live-performances, conference, musical and opera, church, school, hall, family, party, etc…Distance 150 meter,open and spacious ideal usage distance 100 meterSpecification:

Receiver
Consume power	3w
Signal/noise ratio	>80dB
Image&spurious rejection	>70dB
Border upon channel rejection	>70dB
S/N	less than 12dBu(sind=20dB)
De-emphasis	50us
Power supply	AC 110V~220V.(±10%) 50Hz
Dimensions	190(L) x 140(W) x 36(H)mm
Microphone
RF Power output	15mW(MAX)
Spurious Emissions	Over 45dB carrier ware
Microphone element	unidirectionally dynamic microphone
Battery	Two Standard AA battery for each(included)
Current consumption	About 25mA
Battery life	Over 8 hours continuous operation
Dimensions	51(D) x 243(L)mm
Overall system
Carrier frequency rage	VHF 220-270MHz
Frequency stability	<+20ppm
Dynamic range	more than 80dB
Maximum deviation range	±25KHz
Frequency response	40Hz-18KHz+3dB
Audio output level	0~±400mV mix out 0~±200mV
T.H.D at 1KHz	≤0.5%
Service areas	150 meters
Temperature range	-10℃~50℃
Length of connecting cable	1.0m
Manipulate range	radio 200
Length of adapter cable	1.1m
Adapter plug type	EU/US

,,,,,,,,,