1.[ and Reliable]: Our OBDII memory saver connector is made of high quality copper wire and premium silicone cable, which is highly insulated and reliable to a long time. Features over-current protection, ensuring and stable operation. 2.[Memory Saver]: The OBDII memory saver is a polarity-protected cable that attaches to a 12 Volt backup battery to provide power via the OBDII port to onboard electronics while the vehicle's battery is disconnected, preventing vehicle data loss and saving the time and effort of re-coding systems. 3.[Practical Function]: This OBDII memory saver connector can display voltage and current. It can prevent the use of batteries that are deficient in electricity, can achieve the purpose of timely replacement of batteries, so that the battery continuous power supply. It can also be used for leakage detection, and can understand the quiescent current of the car in the non-start status. 4.[]: It is very easy to use. Just attach the two crocodile clips to 12v DC slave battery, red indicator light will be on. Then insert plug to car obd port, it will produce continuous beep. And now you can remove the old battery from car and install one.