Check the listing for details. VoltNow RiverFi Portable Battery, Bluetooth Speaker,MicroSD Card, Backup Battery. Condition: New. Listed at 19.99 USD. DescriptionYou need your music, and you need it now. RiverFi offers extreme portability and relentless power potential so you can have your music on-the-go, and charge your phone too. It’s perfect for parties, long trips, anywhere you go where you crave audio and get low on juice. The sound quality is stellar and there’s enough power to fully charge your phone twice. Rock on.Optimized speaker for high fidelity soundMicro SD card slot to store hours of MP3'sEasy Bluetooth pairing w/ one button to connect12 hours of non-stop playtime on 1 charge medium volumeRapid charging speeds for any phone or tabletCompact design to fit into any pocket or bagNeeds to be fully charged before first use. Details & RequirementsDimensions: 3.9"L x 3"W x 1.1"HBluetooth V2.1 + EDRRange of 33 feet2.5 watts of powerMicro SD card not includedIncludes:SpeakerNylon bagUSB cordCompatibilityBluetooth-capable devices (for audio)USB-capable devices (for charging)