Sound Pro II-our most powerful unidirectional microphone system. 10" microphone actually is two microphones in one. One high power microphone element faces forward to capture sounds that are "aimed" at. The second microphone "cancels" noises coming in from the sides, thereby creating the "extended range" effect. The Sound Pro II features a background noise filter switch and output jack for tape recorder Unit comes complete with microphone handle, camera mount, 1 Watt RMS amplifier (+120Db Gain), Sony digital quality folding headset, 6' tape recorder connector cable, "AA" battery for microphone, 9-Volt Battery for amplifier, and slide lock hard carry case. 6 month warranty.