SONOFF S31 LITE No power monitoring function. Both S31 and S31 Lite are UL certificated, this means they reach the indispensable security and reliability standard that a smart plug must have. The smart plug lets you control home appliances via eWeLink APP anywhere, anytime. Also, third-party platforms like Amazon Alexa and Google Assistant can seamlessly work with this plug for a voice-controlled home. The small size makes the smart plug will not occupy another outlet of your socket or power strip during, which reserves more space for other plugs. Convenient to use, plug and play. UL certificated – Secure and guaranteed APP Remote Control – Manage electronic devices from anywhere Sync Status – Provide real-time device status to your smartphone Voice Control – Works with Amazon Alexa and Google Assistant to start a voice-controlled home Timing Function – Supports to set 8 scheduled/countdown timers for devices Share Control – Share devices to control with your family together Smart Scene – Simultaneously triggered on/off a crowd of devices via tapping once Easy Installation – Plug and play Compatibility – Works perfectly with IFTTT and Google Nest Specification： Model: S31 Lite Input:120V AC 60Hz Output: 120V AC 60Hz Max.current: 15A Operating Temp: 0-30℃ Operating systems: (Android 4.1 & iOS 9.0) or higher Wi-Fi: IEEE 802.11 b/g/n 2.4 GHz Material: PC VO Dimension: 76*40*33mm