Features:  Smart Human Motion Sensor: Adopts PIR sensor, with high sensitivity and strong anti-interference ability. Wifi or ZigBee type for option. A ZigBee gateway (not included) is required for using the ZigBee type.  APP Control: Easy to control the sensor via APP, when it detects human movement within the detection range, it will push alarm notifications to your smartphone.  Sensitive Motion Induction: 5m (16.4ft) detecting distance, 120-degree detecting angle, with real-time day and night monitoring, better protects your house.  Easy Installation: Comes with a double-sided adhesive tape for easy installation, no wire required. Compact and lightweight, concise appearance, fits well with your modern house.  Battery Operated: Wifi type needs 3 AAA batteries (not included); ZigBee type is built in with a 3V CR2450 button cell. With low power consumption and long standby time.    Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.    Specifications:  Type: Wifi/ ZigBee (Optional)  Color: White  Material: ABS  Wifi: 802.11 b/ g/ n, 2.4GHz  ZigBee: ZigBee 3.0  Detecting Angle: 120-degree  Detecting Distance: 5m  APP Control: Compatible with 'Smart Life'  Power Supply:  Wifi: 3 * 1.5V AAA Battery (NOT included)  ZigBee: 1 * 3V CR2450 (Built-in)  Item Size:  Wifi: 62 * 62 * 30mm / 2.44 * 2.44 * 1.18in  ZigBee: 33 * 27mm / 1.30 * 1.06in (Dia. * H)  Package Size:  Wifi: 6.8 * 6.8 * 3.3cm / 2.68 * 2.68 * 1.30in  ZigBee: 6 * 6 * 3.3cm / 2.36 * 2.36 * 1.30in  Package Weight:  Wifi: 64g / 2.25oz  ZigBee: 27g / 0.93oz    Package List:  1 * Human Motion Sensor  2 * Double-sided Adhesive Tape  1 * Screw  1 * User Manual (English)