Size and Package: Each Size: 6 x 3.5mm/0.24" x 0.14" (D*H); Wire Length: 40mm/1.6"; Package Content: 10 x Electret Microphone. Feature: An acoustic-to-electric transducer or a sensor that converts sounded into an electrical signal. Clear Audio Quality: With a 3.5mm jack connector type, high sensitivity and low noise, this 3.5mm electret microphone is perfect for stereo recording, providing high-quality cleared audio for all your recording needs. Application: Electret condenser mic is widely applied to telephone, mobile phone, MP3, MP4, laptop, digital camera, intercom, monitor, etc. Electret Condenser Microphone: Back electret type, small in size, in general use. Come with a 2 wire cable for easy connectivity to your device.