1. OBD2 Male to female extension line: The Length is 1.5 Meter of the line can Connect between Diagnostic Link Connector (DLC) and scan tool. 2. ALL OBD signal breakout with 4mm Banana socket: Sixteen high-quality 4mm banana sockets breakout all OBD signal for easy to Connect a multimeter or oscilloscope for detailed signal analysis. 3. OBD Signal Detects: Sixteen Led lights detect the OBD signal . Leds at pin-out display signal detection, Flashing Leds. for ECU activity,the led can Detect PWM (J1850) VPW (J1850) ISO 9141-2,DIS/ISO 14230-4 (12V car and 24V diesel)CAN bus (J-2284) (SAEJ1939) Power signal and ground signal . 4. Battery voltage monitor: 3-digit blue LED (resolution: 0.1 V) Voltmeter can Continuous numeric display of voltage, Measuring range from 8-30V.So the BOX not only can detect car signal but also can detect some of diesel signal for example the diesel of K-line L-line and CAN bus (SAEJ1939) 5.with flashlight function of OBD Connector: The OBD Male Connector with flashlight function and the button,When operating in the dark the flashlight will be very useful Colour: As Shown Material: Plastic Package Contents: 1 x Car Protocol Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.