Features: Professional VHF wireless handheld microphone system. 4 different frequencies(740.2MHz, 759.1MHz, 745.1MHz, 758.2MHz). High sensitivity, super clear sound, great anti-interference capability. Effective working range up to 30m / 100ft in open-area. Standard XLR balanced and 1/4 mixed output interface. With volume adjusting knobs for 4 channels separately. The mic run on 2 * AA batteries(not included), and the receiver powered by power adapter(110-240V). Comes with a 1/4 audio cable. Perfect for stages, ballrooms Karaoke, families party, meeting, as well as for giving a speech, presentation, public address.