QFX's M-309 Wireless Professional Microphone System is the perfect way to untether yourself from restrictive cabled microphones - ideal for speaking engagements, outdoor events, Karaoke, and more! Complete system includes lapel and headset microphones, receiver, transmitter, and batteries - everything you need to get started, all in one box. Specifications: frequency response 80-12500Hz; effective range 15 to 30 meters. 9V (1) and AA (1) batteries included. Black finish. QFX leads the market in lifestyle consumer electronics by delivering innovative product designs and exceptional performance to value-conscious consumers without compromise. With three decades at the frontline of quality electronics, QFX stands firm in its commitment to offer the latest in Bluetooth audio, tailgating and DJ speaker systems, LED TVs, and many other prosumer multimedia solutions, affording budget-focused families, businesses, and everyone in between, industry-leader quality without breaking the bank. QFX has the gear you need at the price you want!