features body pack transmitter, clip-on lavalier microphone and 1/4 plug wireless receiver, high sensitivity and 60Hz~13KHz frequency response, VHF receiver. Perfect for giving a speech, teaching lectures, conference speech, promotion, visiting guide. Features: Portable clip-on microphone to effectively give out stronger sound without any hum or crackle noise. High sensitivity and 60Hz~13KHz frequency response, VHF receiver. Operating range around 30 to 50 meters at open area without obstruction. Features long durable cable, the cable length up to 90cm/35.4in, free for you perform your presentation. Clip-on lavalier microphone and belt pack transmitter design allows you more comfortable and enjoyable during speech. With volume control and LED indicator. Powered source: 1 * 9V battery for transmitter, and 1 * AA battery for the 6.35mm wireless receiver. Easy for operation, great for teaching lectures, conference speech, promotion, visiting guide.