MECHANIC DT3 Data Cable Detection Board USB Cable Tester Short Circuit On-Off Switching For iOS Android Type-C Test Board Tool  Instruction of LED indicator: The LED indicator will turn on if the cable is fine. VCC or GND is not on: Charging function has problem. D+ or D- is not on: Data transfer has problem.  Designed for dual type-c cable testing ONLY,the LED indicator won’t turn on when there is problem. The LED indicator won’t turn on when you testing other type of cable. LED indicator: Four lights are all on.  Tips:The five lights will turn on at the same time when connect with dual type-C cable,one of them does not turn on if the corresponding circuit has problem. Compatibility Using 5v charger, computer or other USB interface for power supply. Type-C to Type-C Type-C to Lightning USB to Lightning USB to Type-C USB to Micro Tips:Test with one single cable each time, it won’t work when insert more than one cable at the same time. Easy to use with simple mark. Improve the efficiency of testing for data lines. Instruction of the tester 1.Using type-C charging cable for power supply. 2.Insert the corresponding plug of the data line into the output port.(just like connect with charger) 3.Insert the corresponding plug of the data line into the input port.(just like connect with cellphone) 4.Watching the LED indicator: VCC and GND is not on: Cable has problem. D+ or D- is not on：Data transfer has problem.(It is a cable without data transfer function if VCC and GND is on) 5.Testing of dual type-C data line: CC LED indicator: Use for dual type-C data line testing only,it won’t turn if the cable has problem,if you test with other type of data lines,it won’t turn on as well. Tips When testing,insert plugs to power supply port,data line input and output ports only,other ports should be free,test for one cable each time. Packing details Mini package, less space needed Product Information Brand Name: MECHANIC Product name:Data Cable Tester Package Dimensions: 95*62*15 (mm) Product Dimensions: 48.5*45 (mm) Item weight: 12g Compatible models Model1: USB TO type- C Model2: USB to Lightning Model3: USB to Micro Model4: Type-C to Type-C Model5: Type-C to Lightning