1.with USB/SD slot portable speaker. 2.with FM radio portable speaker. 3.Rechargeable portable speaker. FUNCTIONS:•Portable speaker with FM radio.•Accompanying speaker for PC,MP3,MP4 and notebook .•Rechargeable portable speaker.• Battery:900mah. DETAILS:Output: RMS : 1.5WReceiving Frequency : 87.5---108MHZ Speaker: 8ohm 3inch 3W S/N :≥36db Battery : 3.7V 900mah MAIN MARKET:China, EU,south America ...