Flexible microphone compatible with mobile phones, iPhone high sensitivity and low noise compared to built-in microphone to reduce unwanted back and side sound and video using small size lightweight plug compatible with 3.5mm standard audio jack in call frequency: 35Hz-18KHz No battery signal required / Noise: 74dBSPLPema: 21g Converter: Condenser Microphone Type: Single Channel Communication: Wireless Style: Plug-in Use: Compatible iOS Model Smartphone Number: Smart Color: Black Material: ABS Content: 1x Mobile Phone Microphone 1x Sponge Cover Content Soft above packaging, other products are not included. Note: Different light sand colors may cause the color of the item in the image to be slightly different from the actual content. The allowable measurement error is +/-1-3cm