This wireless system is professionally designed, has the advantages of quick setup transmission, far effective operating, stable frequency and so on, it is very suitable for those who like electric guitar playing or vocal concert. Quick setup audio transmission Far effective operating distance Pure quartz circuit for stable frequency No switching noise Adjustable input gain Fit for all kinds of sensitivity electric guitar signal LED power indicates working status and low battery warning.Specification: Carrier Frequency: 220MHz-270MHz Modulation Mode: FM Frequency Response: 40Hz-18kHz Frequency Steadiness: ±0.005% Transmit Power: ≤10mW Max Modulation Degree: ±20kHz Dynamic Range: ＞105dB Resonance Distortion: ＜0.5% S/N Ratio: ＞80dB Audio Output Level: 0-700mV Receiver Power Supply: DC 12V/300mA Transmitter Power Supply: 2 x 1.5V AA Battery Transmitter Playtime: Approx. 10hrs Operating Range: 30m Approx. 30mPackage includes: 1x Body-pack transmitter 1x Receiver 1x Antenna 1x Audio connecting cable (3.5mm-6.3mm) 1x Audio connecting cable (6.3mm-6.3mm) 1x Power adaptor 1x User manual