This Custom Drone Valley Smart Controller Wireless Microphone Kit allows you to quickly use an external microphone with your Smart Controller. This enables you to record better audio when you're narrating your drone flights. The wireless receiver plugs directly into the bottom USB-C connector on the Smart Controller and the wireless transmitter clips to your shirt. The case is also a power bank and will recharge the transmitter when you slip it back into its slot. This product can also be used with most phones and laptops that provide audio through their USB-C port. This Audio Kit was designed by the team here at Drone Valley and has been thoroughly tested with the following gear to give you years of great service: First Generation DJI Smart Controller Second Generation DJI RC Pro New DJI RC (sold with the Mini 3 Pro)