Meet the Iris Smart Fob: a smart little gadget with 4 customizable buttons that gives you convenient control over your smart home devices. It can be used to lock doors, turn multiple lights off, and a whole lot more. It has a proximity sensor, so you get notifications when family members come and go.
The device is compatible with iOS and Android devices. It comes with an app to manage your smart devices. The button is compatible with the Iris Smart Home system. Costs under $25 at this time.