Fangrui Product Details 1. 12v24v 4 Pin 5 Pin Automotive Relay Tester 2. Material: Abs 3. Application Range: 12v24v Automotive Relay 4. Led High-definition Display, Can Be Operated In Dim Environment 5. Lighting Design, No Fear Of The Night, More Convenient To Detect Automotive Relays, Just One Button To Turn On 6. This Product Is Mainly Used To Detect Whether The Automotive Relay Is Normal 7. Size: 97x27x200mm 8. Note: The Product Requires 18650 Batteries X2, And The Battery Is Not Shipped! 9. Instructions: 10. Install 2 Batteries Into The Instrument (according To The Instructions), And Do Not Invert The Positive (+) And Negative (x) Poles Of The Batteries 11. "off 12v 24v" Is The 12v Relay And 24v Relay Selection Key; After The Power Button Is Turned On, The Current Battery Power Will Be Displayed Immediately (if The Battery Power Is Insufficient, Please Charge It In Time); And There Is A 12v24v Relay Selection; Select The Voltage Volts Of The Corresponding Automotive Relay To Test 12. "4 Pin 5 Pin" Is The Four-pin And Five-pin Key; Select The Four-pin And Five-pin Under The Automotive Relay To Be Tested (usually These Two Pins), If There Are Special Pins, It Cannot Be Tested 13. "test" Is The Test Key; Select The Corresponding Relay Type (12v Or 24v), Pin (4 Pin Or 5 Pin), When The Test Button Is Pressed, The Instrument Will Open And Close 10 Times For Detection, And End When A Buzzer Sound Is Heard; And The Display Area Will Show "ok" Or "bad", Which Means "ok" Means The Relay Being Tested Is Good; "bad" Means The Relay Being Tested Is Bad (analyzed Based On The Length Of Time It Takes To Be Released) 14. After Using The Instrument, Pull The Switch To "off" To Turn Off The Power, Remove The Relay