The item is a set of 5pcs HC-SR501 professional and practical human body pyroelectricity infrared sensor modules, which features automatic induction, photosensitive control and have 2 trigger modes for choice, and whose sensitivity and holding time can be adjusted according to your needs. With easy and safe to use, It is be widely applicable to security products, human body sensor toys, human body sensor LED light, etc. Features - 5 pieces of the HC-SR501Human Body Pyroelectricity Infrared Motion Sensor Modules in one set will be sold together. - Model: HC-SR501. - Color: as shown in the pictures. - Material: durable copper-clad laminate (CCL). - Dimension: about 3.2cm x 2.4cm (Lx W). - and Human Body Pyroelectricity Infrared PIR Motion Sensor Module. - Infrared sensor with control circuit board. - The sensitivity and holding time can be adjusted. - Working voltage range: DC 5V-20V. - Current drain: less than 60uA - Voltage Output: 3.3 V (high) / 0V (low). - Detection distance: less than or equal to 7 meters. - Detection range: less than 120-degree. - Delay time: 0.3s-18s (can be adjusted) - Blockade time: 2.5s (default). - Trigger mode: L (unrepeatable trigger), H (repeatable) (default). - Work temperature: -15C to 70C Applications 1. Security Products 2. the human body sensors toys 3. the human body sensor lighting 4. industrial automation and control, etc. Notes - The potentiometer clockwise to adjust the distance, sensing range increases (about 7 meters), on the contrary, sensing range decreases (about 3 meters). - Delay adjustment potentiometer clockwise rotation, sensor delay longer (about 300s), the other hand, induction by the short delay (about 5S).