The lighter ABS makes the speaker volume smaller. The built-in 1200mAh battery allows the speaker to work continuously throughout the day. The speakers are available in 4 colors. The speaker can use Bluetooth, memory card, U disk and data cable to play music. The built-in antenna can use the speaker as a radio, and the built-in microphone can use the speaker as a portable microphone. You can customize your company logo,name,slogan on the surface.Feel free to inquire!