Keep up with a successful preventative maintenance program for your motorcycle, ATV, power watercraft, or boat with this Hour/Tach Meter from Hardline Products. The hour meter shows total hours accumulated, and the hour/tach meter shows RPM's when the engine is running. When the engine is off, the meter shows total hours accumulated. It works on any gas engine up to two cylinders and 16,000 RPM, and it can be used with fuel injection engines. Installation is easy with simple patented one wire hook-up. Use this Hour/Tach Meter to keep track of your total time on machine. Plan oil changes, valve services, clutch service, chassis lubrication, and other maintenance schedules. It's ideal for use with lawn and garden equipment, pressure washers, generators, small engine, marine outboards, dirt bikes, PWCs, ATVs/UTVs or any 2/4 stroke engines up to two cylinders. No power is required -- the meter has a 10-year battery sealed inside. The unit measures 2-1/8 x 1-1/2 x 5/8 inches and it comes with a log book. Hardline Products is an industry leader in after-market power sports accessories, offering matched registration letter and number kits, decal application and removal fluid, and more for on- and off-road motorcycles, boating, personal watercraft, all terrain vehicles (ATVs), snowmobiles, and karting. Made in the USA. Works with any gas engine up to two cylinders and 16,000 RPM Adjustable input for all types of ignitions, including fuel injected engines Hour meter shows total hours accumulated; hourtach meter shows RPMs when the engine is running Easy installation; no power or ground required Internal battery lasts up to 10 years Instillation wire is 14 inches long