Features: 1.Show both engine rpm and hours of operation 2.Work on 2 or 4 stroke gas powered engine, induction type design, only need to connect the cable on the spark plug can operate 3.LCD screen display showing data clearly 4.Programmable maintenance interval setting 5.Build in battery for long time use Specification: Features: _x000D_ Show both engine rpm and hours of operation._x000D_ _x000D_ Work on 2 or 4 stroke gas powered engine, induction type design, only need to connect the cable on the spark plug can operate. _x000D_ LCD screen display showing data clearly. _x000D_ Programmable maintenance interval setting. _x000D_ Build in battery for long time use. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: Plastic _x000D_ Color: Black _x000D_ Hours Range: 99999H_x000D_ Hours Accuracy: 0.1H_x000D_ RPM Range: 300~30000rpm_x000D_ RPM Accuracy: 10 rpm _x000D_ Waterproof Rate: IP65_x000D_ _x000D_ Battery: CR2450 (not included)_x000D_ Item Size: approx. 7.4 x 4.7 x 2cm / 2.9 x 1.8 x 0.8inch _x000D_ Package Weight: approx. 65g/2.3oz _x000D_ _x000D_ _x000D_ Package Included: _x000D_ 1 x Tach/Hour Meter with Wire _x000D_ 2 x Self-locking Nylon Zip Cable Tie_x000D_ _x000D_ _x000D_ _x000D_ Note: _x000D_ It is easy to install, but professional installation is highly recommended. PackageList: