Features: Professional electric guitar wireless system transmitter with mic receiver. UHF provides great stable signal transmit, full clear sound quality. 500-980MHz UHF frequency range, 32 selective channels, best anti-interface capacity. Adopts noise locked pilot tone locked, low noise. Audio output selective, 6.35mm audio output port. Easy-to-read LCD display, with adjuster for volume frequency. 40-150m operating range in open areas, effective transmit even with obstacles. 2 * AA batteries for receiver 1 * AAA battery for transmitter(batteries not included). with a DC 3V 450mA adapter for charging or power supply. Free for your performance for it occupies little space.