Large approx. 4" diagonal viewing area with minimal plastic surround Glass front capacitive touchscreen at 800x480 resolution Compatible with Tuya Smart APP, Amazon Alexa and Google Home, Quickly check whether doors are locked and either unlock or lock any door from one menu. Arm/Disarm your security system or alert emergency personnel Now includes camera pop-up on event, shades category, “all off” lighting, and more free upgrades. What matter where you are, just use your smart phone Tuya smart APP, you can control all of smart home appliances. And you also can set home model and leave home modle.Everything be easier.