description digital pulse tachometer hour meter gauges applicable to gasoline generator and gas engine. work with miniature motorcycle, small motorcycle, outboard motor, small motor, boat, lawnmower, push mower, chainsaw, dirtbike, atv, utv, go kart, scooter, cub cadet, golf cart, sailboat, moped, jet ski, snowmotorcycle, pit bike, minibike, paramotor, pickup, garden tractor, riding mower, leaf blower, pressure washer, snowblower, scrubber, brush mower, small engine, self powered engine etc tachometer equipped with Hall effect. the external tachometer/hourmeter shows current rpm of the engine. recordable rpm range is between 0-25000. refresh rate is 0.5s or 1s. when engine rpm goes up to setted alarm rpm, the alarm icon and value flashes with red backlit will remind you. max rpm will record the maximum rpm each time you use the engine lcd hour meter positive tot display shows whole runtime of your engines. this value is unresettable. job mode shows the particular working time of two units seperately. note: please long-time press ""m"" 3s to clear one of the job time if you want to meter another equipment sevice time progammable countdown maintenance time. when it's time to maintain, the red backlit and alarm icon flashes will remind you. note: please take a note about how many hours your engine has worked each time, if you want to use the service mode on two machines basic battery operated powered by cr 2450 battery. date recovery after battery replacement. the screen will automatically turn off to save energy when the engine is not working or no signal detected. it will automatically work again without any operation if signal detected design tiny size, portable to carry, with mountable velcro, easy to mount. stroke mode setting work with single cylinder or multiple cylinder. engine ignition mode
現在就開始- 它是免費的 
