1) Unique Design - Tool Free. Open and maintance the traffic light without any special tool 2) High Light - Use the best quality LED components 3) Long Life - Up to 50,000 Hours, adopted the PWM constant current power, protect the LEDs efficiently 4) Energy Saving - Can save up to 80-90% energy 5) IP65 Grade Sealed moisture resistant enclosure 6) Related Approvals - CE, Chinese GB14887-2003 standards and related international standards.