Together with the frame adopting integrated Aluminum Alloy and the ABS panel, you get to enjoy a delicate speaker for your outdoor trips. The square box design is exquisite and portable. Two speakers and one bass radiator were built into M1 to produce a stereo rock sound quality. It also includes Adopt Bluetooth 4.0 chipset to enhance the stable transferring rate. The built-in 950 mAh polymer lithium battery can play music around 4 hours at medium volume. Apart from this, the MIFA APP supports wireless card reader function, read the lossless music from Micro SD card, control music play and set alarm clock through APP. Choose your favorite color and start enjoying your favorite music even more.