16-Way Adjustable Countdown Timer: Offers 16 settings from 0–10 minutes for precise timer customization. Multi-Functional Display: Shows air/fuel ratio, O2 sensor voltage, and battery voltage for comprehensive vehicle monitoring. Universal Fit with Pen-Style Design: Compact, pen-shaped unit designed for vehicles with a 12V power source. Handbrake Safety Feature: Automatically shuts off when the handbrake is released without the ignition key. Installation Time: 45–60 minutes Installation: Professional installation recommended. Operating Temperature: –20°C to 60°C (–4°F to 140°F) LED Indicator Digital Timer Functions: Manual Mode (0–10 minutes) Memory Mode #1 (one-touch, 1-minute setting) Memory Mode #2 (one-touch, 3-minute setting) Battery Voltage Display: Compatible with standard turbo timer harnesses Battery Voltage Monitoring Peak Value Indication ON/OFF Warning Function All items are sold as described. DIY installation is possible; however, professional installation is strongly recommended. Please verify compatibility before purchase. Product design or color may vary slightly between batches; such variations do not affect functionality. Specifications: Backlight Color: Blue Material: Plastic Package Contents: 1 x Control Unit 1 x Relay Unit Note: Color representation may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.