... governor tester Tai'an Jiaxing Trading Co., LTDRED-4 ZEXEL electronic controlled in-line fuel injection pump electronic ... Range: 5%-95%5. Precision : ±0.1%6. 4 Pre-set : 5%, 16.25%, 72.5%, 95%BUTTON ... corresponding indicator light turn on, press ↑ ↓button to choose 4 kinds of pre-set : 5%, 16.25%, 72.5 ... pre-set well, don't change it by any way, and leads to abnormal usage.USAGE INSTRUCTIONS: Connect ...