Power requirement: DC 8-24V Measuring range: 10~9999RPM. Error range: 0.1% Clear zero: Automatic. Clear zero time: approx. 10s. Reset frequency: 0.2-0.5S (120-1200RPM), 0.25-0.06S (2400-9999RPM). Response frequency: 100Hz. Measurement indication: (RPM Less than 5000, +/- 2), (RPM More than 5000 +/- 3). Sign: NPN 5-wire normally open. Display: 4 red LED. Tachometer size: 79 x 42 x 25mm. Panel cutout size: 76 x 39mm. Hall proximity model: -5002C. Detected objects: . Detection range: 1mm-10mm. Proximity output current: 20mA (For the sensor). Operating temperature: -10 to 60 degree. Sensor wiring: brown (Power +), black (Test +), blue (signal). Sensor size: 60 x 10mm. Sensor length: 1.2M Magnet: 10x2mm Function selection: 1. reset or manual reset on power. 2.save data (no power). Material: metal + plastic Package includes: 1 x Red LED Tachometer 1 x NPN Hall Proximity Sensor 1 x Magnet Note: Light shooting and different displays may cause the color of the item in the picture a little