Features:
Integrate Tachometer and Hour meter into one, and works on any 4 stroke gas engine.
Displays Tach when engine working and Hour when engine stops working.
Inductive design: You just need to wrap the wire around the spark plugs.
Epoxy encapsulated casing resists water, fits different environments.
Easy installation with the included wire and mounting screws.

Specifications:
Type: Tachometer and hour meter
Waterproof grade: IP68
Resolution: 0.1HRS /30 RPMS
Rec/Display to: 99,999.9 HRS 
Max RPM: 15,300
Operating temperature: Standard -30°C to +85°C
Battery: 1 * CR2032
Operating battery life: 2 years
Material: ABS
Color: Black
Wire length: Approx. 110cm / 43in
Meter size: 5.4 * 3.7 * 1.5cm / 2.1 * 1.5 * 0.6in
Meter weight: 36g / 1.3oz
Package size: 18 * 10.3 * 1.5cm / 7.1 * 4.1 * 0.6in
Package weight: 63g / 2.2oz

Package List:  K1304B
2 * Hour Tachometer
2 * Wire
4 * Screw