The Makita cordless job site speaker with protective bumper, features woofer for low sounds and tweeter for high sounds. It has Bluetooth® technology that helps to connect mobile device to play music wirelessly. Speaker works well with all MP3 players. It features dust and water-resistant durable construction for improved operation in harsh job site conditions. This speaker works for up to 35 hours continuously in auxiliary mode and 31 hours with Bluetooth® mode. This cordless jobsite speaker is compatible with Makita 12 Volt max CXT® and 18 Volt LXT® batteries. Speaker powered by an 18 Volt Lithium-Ion battery assures fastest charge time, more working time and minimal sitting time on the charger. This speaker weighing 7.2 lb reduces operator fatigue. It has one auxiliary port for MP3 compatibility and one USB port for charging your mobile device.