Parameters: Product material: ABS Transmission distance: 20m/65ft Sound delay: 25ms Endurance: 6h Transmitter battery capacity: 70mAh Rechargeable case battery capacity: 300mAh Adapter: 5V/1A Connection mode: automatically connected when the power on Package List: Box * 1 Mic transmitter *1 Receiver *1 Charging cable *1 How 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 microphone Step 2: Plug the receiver into the phone Step 3: Turn on the mic transmitter Step4: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 Devices Q2: 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.