1. Well-designed, portable and unique 2. Built-in-Lithium-Polymer-Rechargeable battery 3. ... the bomb, which is unique and subtle. This product s portable and provides perfect sound. Built-in-Lithium Polymer rechargeable battery ... various of music player, such as computer, laptop, mobile phone, MP3, MP4 and MP5, etc. Features: 1. Well-designed, portable and unique ...