Plug and play, no APP is needed: the innovative Lavalier Microphone is diffent from others, which includes transmitter and receriver, they will atutomatically connect, so APP and Bluetooth are not required. Just plug the transmitter into the devices (USB C port) and play it directly. Real-time Crystal Voice Syncs without any delay: Using real-time auto-sync technology, which extremely reduce the video post-editing. Support Multi-Channel Real-Time Mixing, it can synchronize the background music for phone and human voice in real time. Can work on Youtube/Facebook Live Stream: the microphone can be used directly when you play Youtube or Facebook Live stream, conventional Bluetooth ones fail to realize. Mini-Size Portable Durable: The wireless lavalier microphone can provide more than 6 hours of cotinuous use after being fully charged. Just Clip and go, no cables required - perfect for outdoor recording. CD High-qualiry stero Sound without delay. Designed for Video Vlogger, Bl ogger Content Creator,Interviewer and Lecture No APP or Bluetooth is needed, it makes so easy to connect, just plug and play. Size: 38.5 x 12.13 x 0.8mm Package list: 1 x Lavalier Microphone 1 x Receiver 1 x Charging Cable