Fangrui Product Details Made By High Quality Material Components, , Firm And Stable For Us To Use. Transistor Style Hifi Microphone Pre-amplifier. Sound Volume Adjustable Suitable For All Camera Module. Microphone Module Only, Other Accessories Demo In The Picture Is Not Included! Item Type: Microphone Module Working Voltage: Dc9-12v Frequency Range: 200-10khz Monitor Range: 100m Transmission Distance: 1000m Material: Pcb Length: 130mm/5.1inch Note:transition: 1cm=10mm=0.39inch Due To Different Product Batches, The Appearance , Which Does Not Affect The Use Colour:as Shown Material:pc+plastic Package Contents: 1 X Microphone Module Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.