Features. High-quality sound. The built-in microphone core and single audio cable give the microphone stereo pickup effect. Efficient and powerful. The microphone has good smoothness and high sensitivity with long and clear pickup distance. High recording quality. The microphone has a built-in professional high-performance pickup with dual-head complementary interference pickup technology designed for cameras and high-sensitivity condenser microphones to improve recording quality. This camera microphone has a wide frequency response and high definition sound resolution. Easy to use. The microphone does not require battery phone or camera power installation. It is plugged and played. Portable. With a compact structure and a light weight the microphone is easy to carry. Specifications. Material: metal. Color: black. One-way function: Yes. Microphone jack: 3.5mm/0.14inch. Power supply: External power supply. Frequency response: 100-16000Hz. Sensitivity: -42±3dB RL = 680Ω Vs1.5 (1khz 0dB = 1V/Pa). Output impedance: 1-2.2k. Power consumption: Max 0.5mA. Voltage: 1-10V. Maximum sound pressure: 110dB S.P.L. Sensitivity reduction: 2.0V-1.5V sensitivity change less than 3dB. Item size: 9*6*2.8cm/3.54*2.36*1.1inch(L*W*H). Weight: 71g/2.5oz.