2 wireless microphones and 1 receiver: The wireless microphone system consists of 2 clips and 1 receiver on the microphone. It can record two sound sources simultaneously. Also you can use a lapel mic alone. Real-time auto sync: Using real-time auto-sync technology, which extremely reduces video post-editing. Support multi-channel real-time mixing, it can synchronize background music to phone and human voice in real time, provide more than 10 hours of cotinous use after the microphone is fully charged. Just clip and go, no cable required - perfect for the outdoors. Compatible devices: Plug and play no APP is not required- The innovative Lavalier microphone is different from others, including transmitter and recarrier, they will connect atutomatically, so APP and Bluetooth are not required. Just plug the transmitter into the device to play directly, and compatible with all mobile phones on the market. Super performance: Professional full-band audio 44.1~48kHz stereo CD provide sound quality, 6 times the frequency of traditional mono microphones. Built-in DSP single microphone noise reduction. Stable operation: 20m barrier-free connection, 360° panoramic sound collection, high density anti-spray sponge and high-sensitivity microphone. The signal is stable, the barrier-free distance is more than 20 m, and the human barrier distance is 15 m.