Ultimate Ears Roll Wireless Portable Bluetooth SpeakerAudio: Maximum sound level - 85dba; Frequency range: 108hz - 20khzWaterproof IPX7 rated UE roll can be immersed in liquid up to 1m for up to 30 minutesCompatibility: For audio playback smartphones, tablets and other devices that support Bluetooth wireless audio profile [Advanced Audio Distribution Profile (A2DP)] or 3.5 mm audio outputWireless 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 We Only Sell 100% Original, Top-Quality Ultimate Genuine Products. We Only Sell 100% Original, Top-Quality Ultimate Genuine Products.SpecificationsGeneral   Brand: Ultimate Model Number: Ue Roll Color: Blue, Black, PurpleType: Mobile/Tablet SpeakerBluetooth: YesMemory Card Slot: NoConfiguration: StereoPower Source: Rechargeable BatteryWired/Wireless: WirelessWall Mountable Satellite: NoBuilt-in Fm Radio: NoOutdoor Usage: YesProduct DetailsHeadphone Jack: YesConfiguration: Stereo ChannelCompatible Devices: Other Devices that Support Bluetooth, SmartphonesBattery: Rechargeable Battery, Use Time 9 hrBluetooth: withAdvanced Audio Distribution Profile (A2DP)Bluetooth Range: 30 m Warranty Warranty: 1 Year Warranty