AccuTech™ Digital Tachometer - 19KState of the art electronics give you accuracy to within 10 RPM Ultra light weight only about 1 1 2 ounces Fast response Easy recall High RPM warning light helps prevent accidental over reving of expensive motors Includes mounting bracket also helps protect tach from damage 0 19,000 RPM 3 1 2 x 1 1 2 Note: This tach is reasonably water resistant but should be covered or removed before pressure washing car. Important Tech Tip