Wi-Fi/ Bluetooth: music streaming local & online via music apps by Airplay/ DLNA in loss-free high-quality quality within a Wifi range of up to 160 feet. Connect via Bluetooth, or Wi-Fi with your devices like smartphone, tablet etcGreat sound quality for every music style: 10W output and 2.1 channel provides a rich and clear stereo soundAmazon Alexa Voice & online streaming services: Amazon Alexa Voice Service (powered by Linkplay technology) 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 moreUnlimited online streaming services in the GGMM E series APP like Spotify certified, Tidal, Napster, TuneIn, iHeartRadio; 6 Favorite channels can be saved directly by pressing the button or via the GGMM E-Series APPMulti-Room & L/ R/ Stereo Music System via Wifi: If you buy two or more E2, you can connect them via home Wi-Fi to play same/different music in every room. Each speaker can stream L/R channels to create surround sound experience. Connect up to 16 speakers as multi-room via GGMM E-Series app (ONLY compatible with GGMM E series). Download "GGMM E Series" App from Apple Store/ Google Play to your phone and control speakers wireless