Specification:
Item Type: Digital Tachometer
Material: ABS
Usage: Speed Measurement
Display: 0.56in 4 digit LED
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: About 3RPM
Input Signal: Voltage pulse signal, active signal, PNP, NPN
Power Supply: DC 8-15V
Installation: Embedded
+12V: DC 8-15V input positive
GDN: DC power negative
Input+: Signal Input

How to Use:
1. Rate range: 1‑99 (default 01: the displayed value is the same as the actual value; if the rate is 10, the displayed value x 10=actual value);
2. When powered on, the meter displays 0;
3. Press the Set button, it will display 1; press it again, it will display 01
4. When 1 is displayed, it is to measure the rotational speed; press Add, from 1 to 2, when 2 is displayed, it is to measure the frequency; display 01 means speed setting, short press Add means +1, long press +10;
5. After setting the value, if there is no operation within 10s, it will be stored and returned to the select