It is installed above the driver's seat of a large truck, An app that reproduces speed indicators (three lamps lined up). Lights up according to GPS speed. ○○○ When stopped ○○● 0km/h or more ●○● 40km/h or more ●●● 60km/h or more Various settings can be customized on the setting page. ① Background (black, carbon, striped steel, camouflage) ②Lamp shape (LED, round, square, star) ③ Speedometer ④ Speed ​​warning sound (Kinkon when a certain speed is exceeded) Kurobe trolleybus mode ○ ● ○ Other t