**Revised Description:** **How to cancel buzzing sound:** Restart the power supply and hold the button until the buzzing stops, then release. **How to reset value:** After self-check, press and release the button (blue light turns on). Hold again for 3 seconds until the light flashes, then release. The pointer resets to zero in ~3 seconds. **How to set alarm points & cylinder:** - **Alarm points:** After self-check, hold the button for 5 seconds (pointer flickers), release, then press to adjust (quick taps for fine-tuning, hold for fast adjustment). Pointer resets in ~5 seconds. - **Cylinder:** After self-check/reset, hold for 10 seconds (pointer flickers), release, press to adjust, then release. Pointer resets in ~5 seconds. *When reaching alarm value, lights flash continuously.* **Features:** - 100% new, fast-response stepper motor. - Two installation options. - DC 12V power, 2.5inch/60mm diameter, BAR unit. - Adjustable white/amber backlight (wiring required). - Compatible with 12V vehicles. *Professional installation recommended. Minor variations may occur due to production batches.* **Color:** As pictured **Material:** Plastic **Package includes:** 1x Turbo Boost Gauge set *Only listed items included. Colors may vary slightly due to lighting/screen differences. Measurement tolerance: +/-1-3cm.* Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin