Ideal for multiple presenters, the PA419-02 has two wireless mic receivers and can even support a third presenter (with a wired mic) at the same time. The PA419-02 is the first PA made for use in schools and churches to feature Bluetooth and NFC (Near Field Communication) capabilities. These quick and easy connections enable wireless audio streaming from any Bluetooth-enabled device - iOS, Windows, and Androidbased platforms. In addition to straight voice amplification out to groups up to 300 people (or in rooms up to 2,000square feet), a computer (to the line input) or a projector (from the line out) can be quickly connected for multimedia presentations. With the voice priority of the PA419-02, making announcements through a connected microphone automatically mutes any music that’s being played. Three seconds after the speaking stops, the music will return to its previous level. The PA419-02 runs on AC power or its rechargeable lithium battery (20% lighter than lead-acid batteries), and plays for at least 2.5hours on a single charge.