The extension four Schuko sockets and four USB ports with surge protection is ideal for home or office. You can enable or disable each individual outlet and USB port group from anywhere by Meross application available on your iOS or Android. Alexa works with Amazon, Google Assistant, SmartThings and IFTTT. Free timers and operating programs. Smart USB ports can provide up to 4A together. Overvoltage protection function keeps your connected devices safely.