About this item Big sound with deep bass for a full range listening experience Wireless and ultra compact so you can take Bose sound anywhere, Bluetooth Transmission Range Up to 30' Built in speakerphone lets you take calls out loud; Lithium ion battery plays up to 10 hours on full charge Voice prompts talk you through Bluetooth pairing, so it's super easy Note: Certain mobile devices may not support these functions. Kindly check User manual on Product Information for Troubleshooting steps