... Trading Co., LTDRED-4 ZEXEL electronic controlled in-line fuel injection pump electronic speed governor testerDESCRIPTION:This ... lamp light, PWM value is 95%4. Pull Down switch, When the lamp light, PWM value is ... 00.00, it can adjust the throttle up and down through the arrow ↑ ↓. Close the RED4 POWER ... the situation Select light power-off, press pull down output value is 95%, press Limp home, controller ...