Product Characteristics: 1. Enables error detection and diagnosis through the OBD connector link. 2. Monitors OBD interface voltage and ground; displays low voltage and diagnostic communication errors. 3. Allows access to OBD interface signals, including signal lines for vehicle decoders from various models. 4. Rapidly detects whether the OBD2 diagnostic connector supports normal communication. 5. Preserves vehicle data when replacing the battery. By connecting the OBD2 device to the car and supplying auxiliary power to the control unit, ECU data is maintained during battery replacement. This OBDII Protocol Detector & Break Out Box is widely used in diagnostics, key programming, and chip tuning. It allows real-time data monitoring while performing vehicle tests, enabling simultaneous test execution and process observation. Features: - Displays testing voltage on cars or trucks - Shows communicating pin numbers - Acts as an extension for the OBD Diagnostic Link Connector - Facilitates pin short-circuiting for testing purposes - Helps detect open or isolated circuit issues - Functions as a power extension for small DC testers requiring an external power source (up to 1.2 amps) - Supports circuit testing using a multimeter or oscilloscope - Verifies Power (Pin 16), Chassis Ground (Pin 4), and Signal Ground (Pin 5) - Prevents loss of ECU data during vehicle battery replacement Material: Plastic Color: As shown Package Contents: 1 x Test Box (B) Note: Other items not included. Lighting effects and display differences may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3 cm.