Dual (2 X Mic) FM Professional Wireless Microphones & Receiver Set! Great for Karaokes, Lectures, Seminars, Parties, Meetings, Events, Speeches, etc. By USA CASH AND CARRY - PrimeTrendz TM Just connect this mic receiver system into a jack for clear, wireless audio Dynamic range: 80dB, Frequency response: 100Hz-10000Hz Service area: 10 Meter under ideal condition, Microphone battery: 9V Includes two wireless microphones, two 9V batteries and the receiver Exclusively by USA Cash and Carry - PrimeTrendz TM. We recommend you to purchase from USA CASH AND CARRY. Warning!!!...Don't be fooled by listings other than USA CASH AND CARRY.