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, sleek pen-shaped design compatible with any vehicle using a 12V power source. Handbrake Safety Feature: Automatically shuts off when the handbrake is released without the ignition key engaged. Installation Time: 45–60 minutes Installation: Professional installation recommended. Operating Temperature: –20°C to 60°C (–4°F to 140°F) LED Indicator Light 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 Note: All items are sold as described. We recommend professional installation. We do not provide installation instructions or support. Please verify compatibility before purchase. Product updates may result in minor variations in appearance or color between batches. These differences do not affect functionality. Specifications: Backlight Color: Blue Color: As shown in product images Material: Plastic Package Contents: 1 x Control Unit 1 x Relay Unit Note: Other accessories shown in images are not included. Color representation may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.