1. 3.5mm AUX audio interface: Perfectly compatible with any media device with a 3.5mm jack, such as mobile phones, tablets, computers, MP3 players, CD players, laptops. Just plug them in directly to play music or video audio. 2. Clear sound quality: The mini speaker is equipped with a 3.5W speaker, which can amplify the sound from mobile phones, tablets, computers and other devices. 4ohm and SNR> 90db can maintain high sound quality and clear bass. 3. Easy to use: Customers using the built-in speaker do not need to download any applications or wait, just plug in the phone and use it. 4. Long battery life: This mini portable speaker has a built-in 350mAh lithium battery, which does not consume power from the phone during playback. When the battery is dead, it only takes 45 minutes to fully charge via the micro USB port (included). 5. Mini portable design: The size of the mini wireless speaker is 47*47*34mm, compact and lightweight design, easy to pack in pockets, briefcases and handbags, and can be used anytime, anywhere.