Type:Digital Tachometer Display:0.56" 4-digit LED Rotate Speed Range:5-9999RPM Frequency Range:0-98990.1Hz Rate Setting Range:1-99(Default: 01) Reset Time:10s Refresh Time:120-1200RPM: 0.2-0.5s; 2400-9999RPM: 0.25-0.6s Accuracy:5000RPM: Approx. 3RPM Input Signal:Voltage Pulse Signal, Active Contact Signal, PNP, NPN Power Supply:DC 8-15V Installation:Embedded Wiring:+12V: DC 8-15V Input Positive, GDN: DC Power Negative, IN+: Signal Input Features:Mini, 4 Digit Display, High Precision Panel Dimension:72mm x 36mm x 20mm/2.83" x 1.42" x 0.8" (Approx.) Description: Brand New & High quality. Mini size, high performance and fast reaction speed.0.56inch LED 4-digits display, clear and easy for readings.Rotate speed measuring range: 5-9999RPM, frequency range: 0-98990.1Hz.Setting parameters will be memorized when power off.Suitable for detecting the speed of every kind of motors. Pls Note: 1.Please allow 0.1-0.3cm differences due to manual measurement, thanks. 2.As shown, all products are made under natural light. What you see is a real shot, but for various reasons, such as a monitor, you may see that the colors on the image may be slightly different from the actual colors. Please prevail in kind. Package Contents: 1 x Digital Tachometer