Features:
Using VHF 174-270MHz band to avert interfering frequency.
Using multilevel high frequency and mid frequency narrowband filter, so as to dispel any possible interfering signals.
The wireless microphones look good and are useful.
There is a volt indicating circuit in these microphones. It can tell you if it is necessary to change the battery.
A specially designed circuit switch is on the phone. It is for clearing up waves of miscellaneous signals.
All use quartz crystal oscillating circuits, so the frequency is very steady.
With audio compressing-expanding technology, the machine can lower noises and increase the dynamic range. It can also lower reecho.
Particular noise detect to avoid interference from outside open the mute system. Choose excellent chipset and high quality component, so that its timbre is very good.
Longest distance in open: 80m. Ideal distance in open: 50m.
It is suitable for stages, ballrooms, auditoria, classrooms and families.

Specifications:
Brand: L&Y
Model: LY-810
Plug:  EU plug, 100-240V
Carrier Frequency: VHF 174-270MHz
Frequency Stability: ±0.005%
Dynamic Range: >80dB
Total Harmonic Distortion: <0.5%
Frequency Response: 60H z~15KH z±3dB
Receiving Sensitivity: 50uS(SIN AD =20dB)
S/N Ratio: >80dB
Border Upon Channel Rejection: >80dB
Image Disturbing Rate: >80dB
Emission Power: 8m W
Audio Frequency Output: Mixed:0-±400mV
Receive Channel: 2 Channels
Receiver Power Supply: DC 12V 350mA
Effective Action Distance: 50-80M
Receiver Size: 17.5 * 10.7 * 4.2cm / 6.9 * 4.2 * 1.7in
Package Size: 32.3 * 26.5 * 6cm / 12.7 * 10.4 * 2.4in
Package Weight: 1100g / 38.8oz

Package List:
2 * Microphone
1 * Receiver
1 * Audio Cable
1 * AC Adapter
1 * User Manual (English)