... ,SD/MMC/MS,USB flash, MP3,WMA Built-in Battery mini portable Speaker with SD/MMC/USB,FM Radio and Alarm clockFeatures ... digital amplifier (3W x 2) 2 inch high fidelity speaker Digital volume control Built-in 600mA lithium ion battery, can play about ... flash the alarm) Standard mini-usb charging port, is compatible with most mobile phone / MP3 MP4 player and USB-powered charging ...