Fangrui Product Details 1. Ae150 Automobile Fuse Current Detector Automobile Dc Digital Resistance Wire Ammeter 2. Details: 3. Material: Abspc+ Plastic Encapsulation 4. Weight: About 127 Grams 5. Size: About 7.4x2.3x4.1 Cm 6. Analysis Index: Suitable For Measuring 0.01a-19.99a Current At The Fuse 7. Application Range: Measure The Quality And Current Of The Fuse 8. Power Supply: Need To Prepare A 23a 12v Battery 9. Features: Abs Body Adopts Rubber Coating Technology, Comfortable Hand Feeling, Lcd Liquid Crystal, Green Backlight, Clear Reading, One-key Operation, Easy To Use, Convenient To Operate 10. Instructions: 11. Turn Off The Vehicle Engine 12. Take Out The Fuse And Put It Into The Slot Of Ae150 To Ensure The Correctness Of The Circuit Protection (tester Detects That The Fuse Is 20a48v, Standard) 13. Insert The Plug Of The Tester Into The Car Fuse Socket 14. If Necessary, Start The Vehicle Engine, Charge The Circuit, And Then Turn On The Tester (by Pressing The Power Switch) 15. Operate The Circuit Under The Test And Display The Detected Current 16. Turn Off The Detector When The Test Is Finished (by Pressing The Power Switch Twice)