• With Motion Sensor connected to your Kasa Smart Home Router, your home can use motion sensing to become even smarter, and that makes your life simpler
• With Open-Closed Sensor connected to your Kasa Smart Home Router, you can keep an eye on doors, windows and drawers in your home wherever you are.
• The CS100 Smart Open-Closed Sensor from TP-Link works in conjunction with the SR20 router (available separately) to alert you whenever a door, window, or drawer is opened or closed. The sensor connects via Zigbee protocol to the SR20 router, which works as a hub. An included AA battery provides up to 2 years of battery life.