Powerful Bass Bluetooth Speakersdouble Bass and double tweetersA21 Bluetooth Speaker is a portable Bluetooth speaker, it have 4 loudspeakers including double Bass, double tweeters and a rear heavy bass guide tube. With this speaker, youll feel as if youre at a live concert, with clear high notes, deep bass and true HD sound.60W Big power blueooth speaker can provide very powerful stereo and amazing bass sound. It will bring you an unprecedented listening experience. Bluetooth speaker with lightsCool flashing LightsThe wireless bluetooth speaker has flashing LED lights, which dance with the music., and the flashing strobe makes music more dynamic and attractive. This cool colorful light can be controlled (you can control the light switch by 'double-click the pause button'). You can enjoy the lights for home party, beach, camping or outdoor travel.