Panasonic WX-ST200 Wireless Electret Condenser Microphone WXST200

Panasonic WX-ST200 Wireless Electret Condenser Microphone WXST200 Frequency Response: 100 Hz to 15 kHz Battery Time: Battery Life: Approx. 8 hours (Ni-MH) Approx. 6 hours (alkaline) Battery Type Required: Rechargeable: 1 x AA Ni-MH Dry cell: 1 x AA alkaline Dimension: Max Diameter 1-57/64 inches (48mm), Length 8-47/64 inches (222 mm) Weight: 0.4 lbs (180 g) - weight including battery