Features: Adopt stereo sound pickup system, can pick up natural sound, transmit super clear stereo sound quality, can set sound pickup mode according to sound source and personal preference (affect the width of sound range), up to 90 degrees or 120 degrees. Specifications: Type: MS Stereo Wire Wire Length: 28 cm/11.02'' Power Requirements: 3V CR2 battery Battery Life: about 800 hours Frequency Response: 30-15000 Hz Sensitivity: -40 db (0 db=1 V/Pa at 1 KHZ) Directivity: 2 X Single directivity Output Impedance: 200 Ω SNR: 76 db Maximum Loudest Pressure Level: 120 db (at 1 KHZ harmonic distortion ≤1%) Power Supply: DC 3V Net Weight: 45 g Gross Weight: 88 g Product Size: 132.5 X 61 X 30.5mm/5.22 X 2.40 X 1.20'' Package Size: 174 X 85 X 35 mm/6.85 X 3.35 X 1.38'' Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3mm measuring deviation due to manual measurement. Included: 1 X Mic-01 Microphone 1 X Manual