1.Plug and Play & Automatic Connection: No Driver, Bluetooth or Application needed. Select the cable adapter that suits your device, then connect the receiver to your device, and then turn on the power button of the two parts, these two parts will pair automatically. 2.Smart Noise Reduction & High Quality Sound: With smart technology chip, the omnidirectional condenser mics pick up sound from all angles, and offer stable quality. Its equipped with sponge to reduce wind noise and plosives, has strong anti-interference ability. It can easily cope with various noisy environments and truly restore human voices. 3.3.5mm receiver is equipped with power amplifier/small speaker, and the sound input is amplified using guide/teaching/dancing 4.1Pack provides one transmitter and one receiver for single person recording only. 2Pack provides two transmitters and one receiver, which can capture two sound sources at the same time. It provides a more comprehensive solution for recording interview content and shooting scenes such as two-person VLOG.