FAVOLCANO Portable Wireless Bluetooth 2.1 Smart Subwoofer Hi-Fi Double Loudspeakers Stereo Speaker with Colorful LED Light Build-in Microphone Support Hands-free Function USB TF Card Long Playtime: A high capacity 750 mAh Li-on battery lets you listen to your music with styles (4+ hours with LED lights on and 6+ hours without lights on). Recharges in less than 3 hours using the included micro USB cable Built-in microphone for hands-free speaker phone calling. Seamlessly stream and share music, movies, games, phone and conference calls anywhere. Easy to pair - No code/pin needed 2 Decorative LED Light Modes: Built-in 4 different colors of LED light show that pulses to your music. You can switch the light modes to find a perfect match for your mood or environment The Bluetooth 2.1 Speaker has built in 3W high quality dual voice coil speakers with full range frequency from 100Hz-18kHz providing an ultra deep bass, mixed with the brightest sounding treble to bring you the highest quality sound for any situation! Support iPhone, iPad, HTC, Samsung, laptops and other devices with Bluetooth function easy to pair and play music. Support the TF card MP3, WMA, APE, FLAL format etc all full decode lossless audio fidelity, easy to play music