TP-Link Tapo T100 Smart 868MHz Motion Sensor, CR2032 batteryMotion Detection - Captures motion in your home with customization.Works with Tapo Devices - Controls other Tapo smart devices based on your movement.Instant Alerts & App Notification - Triggers alarm to warn unwanted visitors and sends you notifications.Adjustable Sensitivity -Tailor your detection coverage with 3 levels. Captures motion up to 23 ft.(7m) away. Flexible Sensor Angle - Rotate the sensor with 120deg view to avoid accidental activations.Battery-Powered - Compact battery supports two years of use. No wiring required. Easy Installation - Mount it by attached 3M adhesive or the build-in magnet.Hub Required - The Tapo Hub is requried to support smart features.