About this item [PORTABLE DESIGN] - This mini portable speaker features a compact size and lightweight design, making it easy to fit in your pocket, bag, or briefcase for convenient use anywhere. [HIGH QUALITY] - This laptop speaker delivers clear loud sound and decent bass, amplifying your device's volume up to 4 times for versatile use. [SIMPLE USAGE] - The portable speaker requires no waiting; simply plug it into a 3.5mm audio jack and turn on the power to enjoy loud audio immediately, ensuring a very simple and convenient operation. [BATTERY LIFE] - This mobile phone speaker does not consume your phone's power while playing, and its built-in 300mAh rechargeable battery allows for an impressive 4 hours of playtime. [COMPATIBILITY] - It works with any media device that has a 3.5mm jack, including mobile phones, tablets, MP3 players, MP4 players, PSPs, PCs, and laptops. Just turn on the power and plug it directly to play music or video audio. Dimensions: 1.3'D x 1.57'W x 2.37'H