Check the listing for details. 4 Digital LED Tachometer RPM Speed Meter + NPN Hall Proximity Switch Sensor Kit. Condition: New. Listed at 8.82 USD. Store CategoriesStore CategorieseBay MotorFashionBooks, Movies & MusicElectronicsCollectibles & ArtHome & GardenSporting GoodsToys & HobbiesBusiness & IndustrialHealth & BeautyOtherProduct View Detail Description: #Blue LED Specifications: Working power supply：DC8-24v 40 mA Measure range : 5-9999RPM. Display :Blue LED 67*32mm Sign:Pusle signal,Hall NPN 3 wires normally open. Hall proximity model:NJK-5002C Appearance:M12mm cylinder. Detection range: 10mm Detected objects: magnet Response frequency: 100HZ Operating temperature: 0 to 50°C. #Red LED Specifications: Power requirement:DC 8-24V Measure range:10 ~ 9999RPM. Error range: 0.1% Clear zero:Automatic . Clear zero time:About 10s. Refresh frequency: 0.2-0.5S(120-1200RPM),0.25-0.06S(2400-9999RPM). Response frequency:100HZ. Measure indication:(RPM5000,±3). Sign:NPN 5 wires normally open. Display:5 x 2cm red LED. Tachometer size:79 x 42 x 25mm. Panel cutout size:76 x 39mm. #Hall proximity model:NJK-5002C . Detected objects: Magnet. Detection range: 1mm-10mm. Proximity output current: 20mA(For the sensor). Operating temperature: -10 to 60°C. Sensor wiring:brown(Power+),black(Test+),blue(signal). Sensor size: 60 x 10mm. Sensor wire length:1.2M Magnet:10x2mm Function selection: 1.Reset or manual reset on power. 2.Store the data (no power). Package Includes: 1 x LED tachometer 1 x NPN hall proximity sensor 1 x magnetFeedbackPaymentShipmentAbout usFeedbackWe appreciate positive feedback . we always try our best to service our customers . so if you have ant question ,PLEASE DON’T HESITATE TO TELL US, we are always here to offer help .PaymentWe prefer PayPal .For purchasing multiple items , please contact us for a combined invoice . generally we would like to receive payment thin 48 hours if . ShipmentWe provide airmail service with good package . The items will be shipped within the nest 2 business days after we received the payment . when you buy multiple items ,your shipping cost will be combined with discount . SHIPPING TIME (weekends/holidays excluded) Country Name Shipping Time Country Name Shipping Time USA/Canada 10 -15d Spanish/Portugue 10-25d East/South Asia 10 -15d France/West Asia 10-25d United Kingdom 10 -20d Italy 10-30d Australia/New Zealand 10 -15d West Asia/Middle East 15-25d Most Country of West/North Europe 10-20d South America and Africa 15-30d East /Middle Europe/Russia 10-25d About us NEW, GOOD QUALITY, ORIGINAL PACKAGE LARGE STORE AND THE LOWEST PRICE NO-QUESTION-REFUND, FOR LARGE QUANTITY ,OFFER BETTER PRICE,ORIGINAL PACKING(TAPE REEL/TUBE/TRAY） We specialize in electronic components . ICs, Capacitors, Diodes, Resistors, LEDs, Transistors, and so on. Especially in Hard To Find Parts . we only sell NEW , ORIGINAL parts . please buy with confidence .We offer NO-QUESTION-REFUND go to my store