Ultimate Ears Roll Wireless Portable Bluetooth Speaker Audio : Maximum sound level - 85dba; Frequency range: 108hz - 20khz 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 We Only Sell 100% Original, Top-Quality Ultimate Genuine Products. We Only Sell 100% Original, Top-Quality Ultimate Genuine Products. Specifications General Brand: Ultimate Model Number: Ue Roll Color: Blue, Black, Purple Type: Mobile/Tablet Speaker Bluetooth: Yes Memory Card Slot: No Configuration: Stereo Power Source: Rechargeable Battery Wired/Wireless: Wireless Wall Mountable Satellite : No Built-in Fm Radio: No Outdoor Usage: Yes Product Details Headphone Jack: Yes Configuration: Stereo Channel Compatible Devices: Other Devices that Support Bluetooth, Smartphones Battery: Rechargeable Battery, Use Time 9 hr Bluetooth: withAdvanced Audio Distribution Profile (A2DP) Bluetooth Range: 30 m Warranty Warranty: 1 Year Warranty