24 Hour battery life recharges via wireless charging base. IP56 Protected from dust and water. Drop resistant. WiFi and Bluetooth. Automatic Trueplay tuning analyzes acoustic surroundings to optimize sound. Apple AirPlay 2. Sonos Radio. Alexa built-in. Touch controls. Line in plays audio sources from non-Bluetooth devices. Sonos app controls and adjusts EQ. 3 Amplifiers 2 Tweeters 1 Woofer.