Ultimate Ears UE ROLL 2 Black Volcano Wireless Portable Bluetooth Speaker Waterproof Certified Refurbished product has been tested and certified by the manufacturer or by a third-party refurbisher to look and work like new, with limited to no signs of wear. The refurbishing process includes functionality testing, inspection, reconditioning and repackaging. The product ships with relevant accessories, a 90-day warranty, and may arrive in a generic white or brown box. Accessories may be generic and not directly from the manufacturer. Waterproof: IPX7 rated: UE ROLL can be immersed in liquid up to 1m for up to 30 minutes. Compatibility: For Audio Playback - Smartphones, tablets and other devices that support Bluetooth wireless audio profile [Advanced Audio Distribution Profile (A2DP)] or 3.5 mm audio output. Wireless Capabilities:Pair up to 8 Bluetooth enabled devices - Connect up to two source devices at the same time. Wirelessly play (stream) to 2 UE ROLLs from one source. Mobile range of play is up to 20m or (65ft). Power:Rechargeable Lithium-Ion Battery for up to 9 hours of battery life between Micro USB charges. Actual battery life will vary with use, settings and environmental conditions. Charge time: 5.5 hours