This single woofer cum speaker is the best option for portable devices like mobiles and laptops. The connectivity is very easy as it comes with a standard studio jack. A superior quality black finish gives it an incredible appeal. The lithium ion battery is of top notch quality and gives you a back up of eight long hours. So you can charge it once and listen to quality music for a long time. The speakers are very rich in terms of the features and come with the option of plug and use. Just connect the speakers to any device and you are good to go.