Alto Pro TX4 Battery Powered Active PA Speaker with Bluetooth (Single) The Alto TX412B is a dream come true for any busker or performer tasked with bringing audio to any space where power is limitedThis battery-powered 600-watt speaker is a cable-free solution to high-quality sound without an outlet in sight. Thanks to an impressive battery life, the TX412B can handle playlists and sets up to 10 hours long. For those looking to use the speaker to project two different sources of audio such as a DJ who might need to make announcements during their set or a Wedding MC introducing the bride and groom over music, look no furtherthe TX412B can run two different inputs simultaneously with grace and clarity. Thanks to Bluetoothconnectivity, the Alto TX Series ensures users can get their PA system up and running completely cable-free. This feature is perfect for any application that requires two simultaneous sources of audioa Wedding MC announcing the bride and groom's first dance over mus