Beautiful appearance, adopt Durable alloy Material to extend the life of use, Support TF card (micro SD TF card) with TF card slot, Can play MP3 format files in the TF card. Metal Case Small Size Super Loud Powerful Strong Bass, Build-in microphone for phone calls. 3inch diameter mini size. New design of the led light under the bottom.You can put it directly in your pocket when go out, Your satisfaction means everything to us , Therefore, all our wireless portable speakers are constructed in adherence to the highest quality standards and always exceed the most stringent quality control!. This speaker not only has outstanding sound quality, but also can be matched with all Bluetooth enabled devices, it is so easy to let you be immersed in the wonderful music,compatibility with all popular iPhone, smartphones, tablets, iPads etc. Super fast and super easy to pair with any device.