Description This item is a digital tachometer and hall proximity switch kit. Both tools are made of high-quality plastic for wear resistance. The measuring range of the tachometer is up to 9999 rpm. / min and will show "1" or "-1" when the data is outside its measuring range. Function - This meter works with many types of devices - With digital technology, it is better to know what is real than to rely on guesswork. - The Hall sensor will light up to indicate power. - Shows measurement data accurately and is easy to install. - The meter is designed to snap into a rectangular hole for flush mounting. Specification -Color: mostly black - Material: plastic - Tachometer Size: 79 x 41 x 25cn / 31 x 16 x 9.8in -Hall Proximity Sensor Size: 40 x 22 x 12mm/1.6 x 0.9 x 0.5inch - Power requirement: DC 8-24V 30mA - Measuring range: 10-9999 rpm. /min. - Refresh rate: 0.2-0.5S @ 120-1200 RPM /min; 0.25-0.06S at 2400-9999 RPM /min. - Measurement accuracy: RPM <5000, ± 2; RPM > 5000, ±3. - Hall proximity model: CF5135C-Z - Detection range: 10mm - Detected objects: Magnet - Response frequency: 9999Hz, 999.9Hz, 99.99kHz - Sensor wiring: brown means power; blue means power-; black means signal. - Operating temperature: 0 to 50°C. Description This item is a digital tachometer and hall proximity switch kit. Both tools are made of high-quality plastic for wear resistance. The measuring range of the tachometer is up to 9999 rpm. /min and will show "1" or "1" when the data is outside the measurement range. Function This PRM meter works with many types of devices Thanks to the digital screen, it's good to know the actual turnover instead of relying on estimates. The Hall sensor will light up to indicate power. It shows the measurement data accurately and is easy to install. The meter is designed to snap into a rectangular hole for flush mounting. Specification Colour: mostly black Material: plastic Tachometer size: 79 x 41 x 25cn/31 x 16 x 9.8 inch Hall Proximity Switch Size: 40x22x12mm/1.6x0.9x0.5inch Power requirement: DC 824 V 30 mA Measuring range: 109999 rpm /min. Refresh rate: 0.20.5s @ 1201200 RPM /min; 0.250.06 sec at 24009999 rpm /min. Measurement Accuracy: RPM<5000, ±2; RPM > 5000, ±3. Hall proximity model: CF5135CZ Detection Range: 10mm Objects detected: Magnet Response frequency: 9999Hz, 999.9Hz, 99.99kHz Sensor wiring: brown means power; blue means power; black means signal. Operating temperature: 0 to 50°C. package list 1 x tachometer 1 x Hall proximity sensor