Looking for a reliable wireless microphone? The QFX M-310 Wireless Dynamic Professional Microphone is ideal for parties, public speaking, events, and more! It includes the batteries, microphone, receiver, wireless antenna, and cable with an effective distance of 49 to 98 ft. for unhindered mobility. Unidirectional dynamic microphone. Frequency response: 100 Hz to 1,000 Hz. Sensitivity: -72 dB. Impedance: 600 ohms. Operates on 1 AA battery. Effective distance: 49 to 98 ft. (15 to 30 m). Includes 2 AA batteries, receiver, wireless antenna, and cable. Safety Data Sheet.