Description: Test and check the interface connection error when using the tool. Monitor the interface voltage and ground wire so that it can display the low voltage stitch and fault diagnosis. Used to jump the interface signal and quickly every interface stitch communication is OK. Save the car data and prevent car data loss and electrical appliances blocking. Specification: Material: ABS Size chart: Box: 140*80*35 Wire length: 400mm Package include: 1 set Note: OBDII protocol and outside break are our newest tools for car repair and development. It is mainly used to change the car stitch to signal the transfer of the grade level. It can connect with any instruments and judge whether the car is normal. Also it can provide when replacing the battery, to avoid the body electrical equipment automatically locked.