... capacity 400mAhUsage time1.5-2 hoursCharge time 3-5 hours Feature: 1.Great speaker system with clear alt and pure ... Built-in fm radio,you can enjoy the radio any time anywhere4.Used for network,computer,mp3,mp4,mobile phone5. ... We are profesional factory,specializing in digital mini speaker,portable mini speaker,usb/fm radio/card reader speaker,mini speaker for mobile phone/computer/mp3,ect. ...