Specification Brand : INLETTER BulletPoint : 1 BulletPoint1 : [Measuring Speed and Energy]: The measurement error of the speedometer is less than 1%. It can measure speed and kinetic energy, and record up to 36 sets of data. With 1/4 standard tripod interface. Speed measurement range: 1-2000 m/s or (4-6500 FPS), energy measurement range: 0.1-2000 J. BulletPoint2 : [Four-Sided Ventilation Design]: effectively alleviate the impact of airflow on testing. Improved stability and accuracy. The display surface and operation buttons are both on the front. This design makes it very convenient to operate and view test data. BulletPoint3 : [Power Management Protection]: Multiple power management and protection. The battery core has overcharge, over-discharge, and short-circuit protection functions, and integrates intelligent shutdown and low-battery shutdown functions. BulletPoint4 : [Simple Operation]: you can start the test immediately after turning on the machine, no need to set or adjust the initial test speed. Just enter the weight of the object to be measured before testing kinetic energy. We provide instructions in English. If you need other languages, you can contact the merchant to send an electronic version of the instructions. BulletPoint5 : [Note]: This product is an infrared through-beam type. The light source has been integrated into the speed measuring instrument and does not require an external light source. Please try to avoid strong light shining directly on the sensor on the main unit. Color : A Department1 : mens Department2 : womens ExternallyAssignedProductIdentifier : 1091971554110 ImportDesignation : Please see the Product Description section. ItemName : INLETTER 1PCS Chargeable Precision Ballistic Chronograph Speed Meter Velocimetry Tolerance ≤1% Measurement Range 1-2000 m/s or (4-6500 FPS), 0.1-2000 J,A,1 ItemPackageDimensions_Height : 4.5 centimeters ItemPackageDimensions_Length : 13 centimeters ItemPackageDimensions_Width : 8 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : industrial-tachometers Manufacturer : INLETTER Material : Acrylonitrile Butadiene Styrene (ABS) Material1 : Plastic Material2 : Glass ModelName : JVPDSLMN ModelNumber : Sports NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : A-1-65815245 ProductDescription : SpecificationWorking voltage: DC3.7V (built-in polymer lithium-ion battery).Accuracy: 1% testing errorOverall dimensions: 102*60*117mmSpeed measurement range: 1-2000m/s or (4-6500FPS)Energy measurement range: 0.1-2000JRecord data: 36 setsweighe: 0.2kgPacking1 * Tachymeter1 * User manual1 * USB cable1 * TripodNotice1. This product is an infrared through-beam type. The light source has been integrated into the speed measuring instrument and does not require an external light source. Please try to avoid strong light shining directly on the sensor on the main unit.2. The charger must be a dedicated charger for polymer lithium-ion batteries (charging will stop when it reaches 4.2V), otherwise the battery will be damaged.3. If not used for a long time, please leave it fully charged and charge and discharge it every 3 months or so. This will be beneficial to the battery.4. When measuring the speed of objects with high speed, please take appropriate protective measures. To prevent objects from rebounding and causing damage. ProductSiteLaunchDate : 2024-03-23T09:37:52.034Z Size : 1 Style : Speedometer SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 53000000 WarrantyDescription : Please see the Product Description section.