✓[Wi-Fi/Bluetooth/Aux]: Connect directly to your Wi-Fi network for Internet radio, your music library and favorite online streaming music services like Spotify, Pandora, and iHeartradio. Connect via Bluetooth, direct Wi-Fi, Wi-Fi router, or AUX. Easily switch among separate audio sources and add up to 16 devices without disconnecting. Wi-Fi works over 160 feet. ✓[Amazon Alexa Voice& Hands Free Calling]: Amazon Alexa Voice Service puts you in full control of your surroundings. Simply press a button and ask Alexa to order a pizza, set a timer, play a song, and more. Connect your device to the E5 speaker via Bluetooth to enable hands free calling. With the press of a button, you have the ability to answer and hang up calls. With a built in microphone, you can speak towards the speaker without having your phone out. ✓[Multi-room Music System via Wifi]: Each Wi-Fi Speaker is part of a whole family of wireless speakers and also systems. If you buy two or more E5 or other E series speaker, you can connect them via home Wi-Fi to play different music in different room or play the same music in every room. Connect up to 10 speakers. Each speaker can stream L/R channels to create surround sound experience. Download "GGMM E Series" App from Apple Store/ Google Play to your phone and control speakers wirelessly. ✓[Style & Customization] Sleek elegant design to fit into any environment in your home. Super slim design 1.5 inch thick speaker makes it a portable speaker, comes with a removable leather strap to take the speaker on the go. With built in Treble and Bass Adjustment Knobs, you have the ultimate control to adjust the sounds to your style and liking. Speaker also has as built in Favorite function that is able to save up to 6 of your favorite online stations. ✓[Built in Battery & Smart Charging Port] The E5 speaker has a built in battery that can last up to 15 hours of playback time. E5 also has a smart USB charging port available to charge your devices like your phone or tablet. Product Works well with all Apple products. iPhone, iPad, iPod, Mac, Android phone/ iOS, OS, Windows.