Features:<br> 100% brand new, high quality.<br> This product can be used in all gasoline engines with spark plugs. This tachometer is easy to use and is suitable for two-stroke single-cylinder, four-stroke two-cylinder and gasoline engines that are fired once a week. It is more suitable for: chain saws and lawn mowers to test the speed of gasoline engines. The measurement speed range is: 100RPM to 30,000RPM.<br> Due to the inductive design, placing the meter near the spark plug cable will test the data.<br> Method 1: Keep the meter 3-5CM between the spark plugs and then test.<br> Method 2: Insert the pickup wire into the instrument hole so that the metal clip is clamped on the spark plug cable.<br> LCD liquid crystal display/low voltage/built-in battery power supply/inductive design/safe and reliable.<br> Press and hold the MODE button to view historical high-speed data.<br> Timing range: 1 minute to 99999 minutes (MIN).<br> Speed mode setting: Long press the (SET) key, the screen will play 01, 02, 03, 04 in sequence: (Screens 01, 02, 03 respectively display the speed modes corresponding to various engine strokes) The factory default value is 02 Speed mode, when you release the button with your finger, the displayed data will flash for 3 to 5 seconds. After stopping the machine, confirm that the speed mode is activated and you can measure.<br> System data reset function: long press (SET), the screen will display 01, 02, 03, 04 in sequence; when the screen displays 04, it will flash for 3 to 5 seconds. When your finger releases the button, the display data flashes for 3 to 5 seconds and stops, then enters the system reset mode, press and hold the MODE key and SET key at the same time until full screen display (reset to zero). Working time and speed data reset<br> The product will enter power saving mode when not in use and will enter working mode once tested.<br> Specifications:<br> Type: Digital Tachometer<br> Color: Black<br> Measurement Range: 100-30000 RPM<br> Timing Range: 1-99999 Minutes<br> Measurement Accuracy: 1%<br> Resolution: 100%<br> Power supply: 1x CR2450 button battery<br> Retail packaging: Yes<br> Package includes:<br> 1 set x tachometer<br> Do you do drop shipping?<br> Yes, we do. If you have any questions, please contact us.<br> Are the production materials safe?<br> All products are 100% brand new, operational and carefully inspected before sending.<br> When will the package be sent?<br> We will dispatch the order within 5 working days. Delivery times vary from country to country and are affected by weather, public holidays, etc. If the order is not received within the stated time, please contact us.<br> How to get a refund?<br> Full refund available if item is not as described or defective.<br> If you have any further questions, please click Help