All-Sun EM276 Professional Injector Tester Fuel Injector 4 Pluse Modes Tester Powerful Fuel System Scan Tool
 
All-Sun EM276 Injector Tester Operation Instructions:

Turn off the vehicle's engine  
Connect Black / Red Clip to the Negative / Positive terminal of battery   
Connect pulse output terminal to the fuel injector
Press the "MODE SET" key to select the desired pulse mode
Press the "PULSE" key, EM276 tester will output pulse to the injector, and then the pulse signal indicator will light as indication  
                             
Explanation for 4 Modes:

Mode 1: the tester outputs 1 pulse, whose pulse width is about 250ms
Mode 2: the tester outputs 50 pulse, every pulse's pulse width is about 7ms
Mode 3: the tester outputs 100 pulse, every pulse's pulse width is about 3.5ms
Mode 4: the tester outputs pulse continuously at the rate of 50 pulses per about 1450ms, every pulse's pulse width is about 7ms

All-Sun EM276 Specification:

Power Supply: 12V vehicle battery
Operation Environment: 0 ℃ - 40℃, relative humidity < 80%
Storage Environment: -10 ℃ - 50℃, relative humidity < 85%
Size: 147x82x29mm (for main body only)
Weight: about 170g

Package Includes:
 
1pc x Carriable Bag 
1pc x  Instruction Manual  
1pc x Not Include Batteries