[COMPATABLE FOR] It works with any media device with a 3.5mm jack such as mobile phone, tablet, MP3, MP4, PSP, PC, laptop, just turn power on and plug it directly to play music or video audio. [BATTERY LIFE]-This mobile phone speaker doesn’t consume mobile phone power when playing, the built-in 300mAh rechargeable battery enables a breakthrough 4 hours of playtime. [SIMPLE USING]- The portable speaker no need waiting, just only plug into 3.5mm audio jack and turn on the power, then you will enjoy loud voice immediately, very simple and convenient to use. [HIGH QUALITY]- This laptop speaker with clear loud sound and decent bass, it can amplify your device volume up to 4 times and lets you widely used. [PORTABLE DESIGN]- This mini portable speakers is with small size and light weight design, you could put it in pocket, bag, briefcase and carry to anywhere for using it anytime.