uhf wireless microphone system, eivotor dual channel handheld wireless microphone with professional karaoke receiver and 2 handheld dynamic mics set, for home party, ktv, meeting, wedding, church eivotor <b>features</b><br> carrier frequency: vhf 500-599mhz<br> modulation: fm<br> audio dynamic range: > 80db<br> maximum distance: 90m(295 ft)<br> power supply: dc12v / 50hz<br> power supply voltage: ac/100-240v<br><br> <b>handheld microphone</b><br> signal/ noise ratio: >80db<br> total harmonic distortion: ≤0.5%<br> microphone: dynamic&cardioid mic<br> output power: high= 30 mw; low= 3mw<br> play time: up to 8 hour(1.5v aa battery)<br><br> <b>package includes: </b><br> 1 x fixed receiver <br> 2 x handheld microphone <br> 1 x 6.5mm audio cable <br> 1 x adapter <br> 1 x 6.35mm to 3.5mm adapter <br> 1 x user manual<br>