Plays wirelessly streamed music from any Bluetooth-enabled device like your iPhone, Android, BlackBerry, iPad, or laptop. Bluetooth connection up to 33ft (10m) wireless range. Built-in battery (rechargeable via USB) allows up to 4-6 hours of play time per charge, depending on the settings and environmental conditions. 70dB power output. Auto silence mode for when you have an incoming call, and auto play for when you want to start the music again.