SIZE AND STYLE OPTIONS: The Speakers is designed to be packed in your bag, stowed in your pocket. Stay entertained wherever you are, from a party to the pool to your own backyard. The Speakers makes it easy to listen to music, whether youre traveling, heading outside, or staying in.WIRELESSLY CONNECTED TO YOUR DEVICES & BUILT-IN MIC FOR HANDS-FREE CALLS: It makes portability even easier. Listen to music while you enjoy a long bike ride, watch TV shows, and streaming movies for hours, or finish an audio book while you work around the house-all wirelessly and without interruption.With a speakerphone setting, you can easily take calls from your phone. Offering another layer of convenience, the feature is perfect for conference calls and anytime you dont want to miss a call.RECHARGEABLE BATTERY WITH USB CABLE: If you arent near an electrical outlet, you can still charge your device via some portable speakers. Using the battery power of the speaker, a built-in USB port allows you to plug in your charger-so you can maintain power on the go. Long playtime: You can play 2-3 hours battery life for playing music on a single charge. Built-in rechargeable 400mAh lithium battery.HOW TO CONNECT TO AMAZON ALEXA:1. Via Aux input. Please insert a Aux line-in cable into Amazon Alexa. Simply done. However, the cable connectivity is range-limited 2. via Bluetooth for wireless connectivity: Amazon Alexa APPDevicesEcho & Alexa XXXs Echo DotBluetooth Devices ( in the section of WIRELESS) PAIR A NEW DEVICE. Done. What's in the box: 1*Speaker +1*USB charge cable+1*User Manual.