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 minutes Installation: To be installed by professional only Operating Temperature: -20 to 60°C (-4 to 140°F) 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 as described unless stated otherwise on the listing. This is a DIY (Do It Yourself) product. We do not provide installation instructions or training. Professional installation is strongly recommended. WE HIGHLY RECOMMEND PROFESSIONAL INSTALLATION! Please verify compatibility to ensure the item meets your needs. Tips: The product may vary slightly between batches, including minor differences in appearance or color, which do not affect functionality. Specifications: Backlight: Blue Color: As shown in photos Material: Plastic Package Contents: 1 x Control Unit 1 x Relay Unit Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.