Surface mounted inductive meter. Knowing what to service, and when, is the key to preventative maintenance program for your motorcycle, ATV, PWC, boat and generator. Meter displays total hours accumulated and RPM's when the engine is running. When the engine is off the meter shows total hours accumulated. Installation is a simple one wire hook-up. Solid state electronics, modern LCD and superb durability. Suitable for all single and twin, 2- or 4-cycle gasoline engines within specified tachometer firing pattern. Operates with new generation 2- or 4-stroke "pen stick" coils. No Power Required - includes 10 year sealed battery. 100% epoxy encapsulated casing resists water. IP 68 Rating. CE Certified. One year warranty. Size 2-1/8" L x 1-1/2" W x 5/8" H