Smart human motion sensor is compact and lightweight, and is very suitable for installing in different rooms or corners of your house to provide home security. With high sensitivity and b anti-interference ability, it will push alarm notifications to the smart APP when it detects human movement within the detection range. 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 * User Manual (English)