The Wireless PRO comes with everything you need to record broadcast-grade wireless audio, including a smart charging case, pair of lavalier microphones, windshields, magnetic clips and all necessary cables for plugging into your devices. The system itself consists of a pair of transmitters and a single receiver. Each transmitter picks up audio via its built-in microphone, or an external mic such as a lavalier, which can be connected via the 3.5mm input. This audio is transmitted wirelessly to the receiver unit, which connects to your camera, smartphone, computer or other recording device either via USB or its 3.5mm output. Audio can also be recorded directly to the transmitters, giving you maximum flexibility.