16-Way Adjustable Countdown Timer:Offers 16 settings from 0-10 minutes, allowing precise turbo timer customization for various vehicles. Multi-Functional Display:Displays A/F ratio, O2 sensor voltage, and battery voltage, providing comprehensive vehicle status. Universal Fit with Pen-Style Design:Pen-shaped design offers a sleek, compact fit for any vehicle with a 12V power source. Handbrake Safety Feature:Prevents vehicle theft by shutting off when handbrake is released without ignition key. Installation Time: 45-60 mins Installation: To be installed by professional only Operating Temperature: -20-60°C(-4 to 140° F) Posite with LED list Digital Timer Functions: Manual Mode (0-10 Minutes) Memory Mode #1 (1 touch, 1 Minute Setting) Memory Mode #2 (1 touch, 3 Minute Setting) Battery Voltage Display:Compatible with all Turbo Timer Harnesses Battery Voltage Peak Value Indication ON/OFF Warning Function NOTE: All items are unless stated otherwise on the listing. We sell DIY (Do It Yourself) . We take no responsibility in teaching you how to install. Professional installation is strongly recommended. WE HIGHLY RECOMMEND PROFESSIONALINSTALLATION! Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Specifications: A:Blue backlight Colour:Photo Color Material:plastic Package Contents: 1 x control unit 1 x relay unit 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.