[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 and 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 / Live Stream]- the microphone can be used directly when you play or Live stream, conventional Bluetooth ones fail to realize. [Superior Performance you can rely on]: The wireless mic offers professional full band audio 44.1~48kHz stereo CD quality, more than 6 times the frequency of conventional mono microphones. Real-Time Auto-Sync Technology, 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. [Mini-Size Portable & Durable]- The wireless lavalier microphone can provide more than 6 hours of cotinuous use after being fully . Bluetooth version: 5.0 Life: 6-10 hours Signal to noise ratio: greater or equal to 60dB Frequency response range: 20Hz-20KHz colour: black Material: ABS Size: 10x5x2cm Package Contents: 1 x microphone 1 x receiver 1 x USB cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.