1.Smart and elegant appearance 2.Outdoor Wireless Micro Speake 3. be suited to fashionable people 4.high fidelity ... of device, such as laptop , computer,mp3,mp4,USB disk,SD/MMC memory card,mobile phone. Technique Parameters: Output power: RMS 3W x2Frequency ... 5V-USB Lithium battery: 3.7V 500mA Materials: plasticBuilt-in: SD card,USB decoder, Rechargeable li-ion battery Our company provide good ...