2.4 GHz WiFi One-Key Connect for Easy Setup. No home gateway required—enables intelligent control of home appliances with simple, user-friendly operation. The 2.4 GHz protocol ensures stable, fast, and convenient connectivity. Detects door or window status: Sends a push notification to your smartphone when the door or window is opened or closed. Works with other smart sensors to create custom scenes—for example, “Away Mode”: if unauthorized entry is detected, a notification is sent to your phone, and a compatible IP camera (sold separately) can begin recording. When a door opens, connected lights can turn on automatically. Remote control via mobile app—manage your home from anywhere, at any time. Compact and easy to install: Adhesive mounting allows flexible placement on doors, windows, drawers, and more—no damage to furniture or walls. Specifications: Input voltage: 3 V (LR03 battery) Standby current: 45 µA Alarm current: 130 mA Low-voltage warning: 2.4 V WiFi standard: 802.11 b/g/n Magnetic sensing distance: 15 mm Power source: DC 3 V LR03 (AAA) battery (not included) Alert method: Push notification via Smart Life / Tuya Smart app Dimensions: Sensor unit: 68 × 23 × 19 mm Magnet: 43 × 10 × 14 mm Package includes: 1 × sensor 1 × user manual 1 × adhesive pad