Marsee X3s Multi Color Flash LED Wireless Bluetooth 3.0 Portable Speaker, Built in Speakerphone, TF Card Slot, Black The light pattern is adjusted and danced by the sound,flash rainbow multi color flash light unique for your music, videos, games and gatherings,party,bar,nighlight use. This speaker with a total output of 3W, with a frequency response of 20HZ-18KHZ . It also has a built-in microphone, so you can use it as a speakerphone, and there are music playback buttons on the top, you can easily pause your music, adjust the volume, or skip to the next track. These buttons also allow you to answer and end phone calls, if youve got it to connected to your phone. The internal battery should provide up to 5 hours of continuous music and it recharges with the included USB cable. It suited for a quiet room.Built-in Rechargeable Battery for up to 5 hours of playtime with one charge. A superb combination of creative state-of-the-art design and cutting-edge innovative technology is here to enhance your enjoyment of music sounds. From listening to music, watching movies or playing games when indoor; to pool parties, house parties, or family outdoor gatherings, this speaker's fine appearance never fails to impress.