Mini portable MP3 Speaker Super Small size with Premium Sound Quality， supports MicroSD and USB Flash Drive. FM Radio Feature Approximate Dimensions: 2.00"x2.00"x2.00". Weight: 5oz. Remarkably good sound quality， Better transient property without sound hysteresis. Very Light aluminium body. Easily fits into your bag or backpack. It is small and lightweight. Built in 1100 ma rechargeable lithium battery or USB Power modes. Approx. 5 hours play time. Works with all sound source with 3.5 audio interface product like: Cell phone， Tablet， MP3， Computer， CD player etc. Mini portable speaker provides portable shape and quality performance for all your entertainment. Ultra-portable with USB power supply. Stylish design and exquisite tone that bring perfect experience for you. Portable mini media speaker improves the volume， sound quality and overall experience of your music. Compatible with all 3.5mm devices. You can either plug it to your phone with 3.5mm headset jack， cellphone， pc， laptop or tablet pc or simply plug your microSD TF card to the mini speaker to listen the music. It produces excellent sound from its mini speaker. Includes usb charging and connection cable. Mini audio box with new concept integral stereo portable mobile music， connecting your MP3，CD， DVD， iPod， iPhone， GPS， PSP， mobile phone， notebook computer. High density metal shell shows noble and fashionable， out of ordinary， with many colors， several solution， for your option. This mini audio box can be deemed as perfect combination of classic and modern performance， and it is praised as masterwork of audio boxes. New mini aluminum vibration film loud speaker， which has clear alt and pure woof.