Wolverine BTunes is an advanced Bluetooth speaker with more than a 100' wireless range. The signal even goes through walls for more than a 60' range. It's compact and portable yet delivers huge sound from both Bluetooth and standard sources. It connects to all Bluetooth audio compatible phones and music players by a simple onetime pairing. No Bluetooth? No problem; Wolverine includes a standard 3.5mm adapter to connect your music player to the BTunes audio input jack. And BTunes is rechargeable. The built-in Li-ion battery lasts more than 10 hours and rcharges in just 2 hours with the included AC adapter or by plugging into any computer USB port. Two full range speaker drivers per unit and a passive radiator provide impressive sound power and amazing bass.