PC Material Red Green Traffic Light Countdown Timer 400mm CE Approved

400mm PC material Red green traffic light countdown timer 1. Features 1) This signal is specially designed to increase the safety of car driver, by showing number of seconds left to change signals from red light to green light to yellow signal or from green signal to yellow signal to red signal to assist drivers to determine if he should continue driving or should slow down to wait for light changed. 2) When Green Vehicle Signal is on, the Green Digits will be shown with