Specification Brand : JIAWANSHUN BulletPoint1 : INFRARED SENSOR: CCD visual photoelectric sensor, can be used to detect any object, irregular/transparent/opaque/thin film, etc., with an adjustable sensing distance of 30cm (11.7in). The sensor is lightweight and compact, with mounting holes for easy installation. BulletPoint2 : LED DISPLAY SCREEN: Blue instrument panel with switch and alarm light, can count up to 999999, with red digits displayed, connected to sensors for real-time counting. The digital display instrument also has functions such as alarm, relay output, power outage memory, etc., to help you meet your counting needs. BulletPoint3 : RELAY OUTPUT&ALARM FUNCTION: With AL1 and AL2 relay outputs, it can connect to other machines and control switches. You can set a value in advance, and when the count reaches this value, the display screen will sound an alarm. BulletPoint4 : WIDELY APPLICABLE: The combination of this sensor and counter expands its application range, allowing you to use it to measure parts or other items, widely used in industrial production fields. BulletPoint5 : EASY TO USE: We come with a wiring diagram and programming steps for the sensor, making it easy to use. If you encounter any problems during use, our customer service team will help you solve them as quickly as possible. IncludedComponents : digital counter infrared sensor ItemName : JIAWANSHUN Digital Counter Led Digital Counter Display with Infrared Sensor,Measuring Parts Number Sensing Distance 11.7in (JHN-500) ItemTypeKeyword : frequency-counters Manufacturer : JIAWANSHUN MeasurementAccuracy : 1 ModelNumber : JHN-500 NumberOfItems : 1 PartNumber : BJHN-35 ProductDescription : Blue infrared counter Count 999999 Infrared sensor, sensing distance 30cm(11.7in) AL1 and AL2 relay outputs, controlling other machines and switches Alarm function, preset the required values in advance Automatic reset, automatically reset to 0 after the preset value is reached Power outage memory function, the values will be restored together after the power is restored Mainly used for measuring parts, metal sensing is very sensitive