Parameters:Product material: ABSTransmission distance: 20m/65ftSound delay: 25msEndurance: 6hTransmitter battery capacity: 70mAhRechargeable case battery capacity: 300mAhAdapter: 5V/1AConnection mode: automatically connected when the power onPackage List:Box * 1Mic transmitter *1Receiver *1Charging cable *1How to use ?Step 1:Android Phone need Download third-party app,Like opencamera cinema-FV and other apps you like.In addition, some Android phones need to set up to use the external microphone input and open the mic permission after downloading the APP (such as Xiaomi, Huawei and other mobile phones), because the default input is the system microphoneStep 2: Plug the receiver into the phoneStep 3: Turn on the mic transmitterStep4:wait for connect then use it .if you want to use it on pc and laptop,pls use USB-A to USB-C adapter(not included )There are some problem you may cccuried :Q1 :Does this USB-C Port item work with GoPro,DJI,insta360 and other USB-C Camera Devices?A: Sorry,this item can only use for phone and Laptop,it can not use for Camera DevicesQ2: Does this item work on PC and Laptop?A: yes,but you need buy a USB-A to USB-C adapter(not in the package)Q3:My Product Not working, what should i do?A:Firstly, i recommend you can check with the use steps in our link,Secondly,if still not work,pls tell me your phone model and send a video,i will helo solve it.