Helix angle: -40~+40: Equipped with a slope header, an alarm will be issued when downhill or uphill exceeds 30 degrees.Support 10 languages: 1. English, 2. Simplified, 3. Traditional, 4. Japanese, 5. Korean, 6. Russian, 7. Arabic, 8. Spain, 9. German,10. FrenchAccelerated / Brake Testa: 100km acceleration emergency braking time and emergency braking distance are important reference data for vehicle dynamic performanceViolation reminders on the windshield:make you more focused on driving and safe driving.All in your line of sight: The information is displayed directly in front of the driver's line of sight. You can understand the current road information without any dangerous operations.GPS can be used for all models: The navigation position displayed on the windshield of the car during driving.P21 is a multifunctional instrument, dual-system OBD+GPS system, which can measure the slope and inclination angle of off-road vehicles, as well as the inclination data of up and down slopes. Provide vehicle speed, direction, engine load notification, with high-precision satellite real-time clock and direction functions.colour: blackMaterial: ABS+PCPackage Contents:1 x P21 host1 x Rotating suction cup holder1 x English Manual1 x OBD cable1 x Non-slip double-sided tapeOnly the above package content, other products are not included.Note: Light shooting 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.