• Passive IR sensor provides the most reliable form of detection24hrs a day
• Functions : doorbell or siren
• Position can be adjusted through 120° following installation
• Unique, compact, portable, can be mounted on a wall or placed on a desk
• Sensors are easy to install

Dimensions: 2.6" x 4.1" x 1.4", power supply: DC 4.5V (3 AA batteries not included), detection area: max. 32ft / angle 89°, switch positions: (1): chime-ding-dong (2): off (3): alarm-siren is activated for 40 seconds and is automatically reset afterwards. Battery life: approx. 120 days (detection only), operating temperature: 14°F to 104°F. Accessories: mounting bracket, screws, wall anchors