Qfx's M-310 wireless unidirectional dynamic professional microphone is ideal for karaoke, parties, seminars, and much, much more. Generous 30 meter range allows untethered freedom of movement. Technical specifications: frequency response - 100-1000hz; Sensitivity -72dB; impedance - 600 Ω. Includes microphone, receiver, wireless antenna, and cable. Silver finish, requires two AA batteries (included). 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!