Features Dual Color LED: Emits uniform light in red and blue, boasting a lifespan of over 10,000 hours, ensuring long-lasting and versatile lighting options. High-precision CNC Technology: The one-piece metal shell offers high structural strength, drop resistance, and environmental protection for durable and reliable performance. Waterproof and Dustproof: Featuring an ingenious design with a built-in waterproof sealing ring, providing protection against water and dust, ensuring longevity in various environments. High Temperature Resistant: Equipped with a flame-retardant base and fire-resistant wires, enhancing conductivity and ensuring flame-retardant properties in emergencies, guaranteeing safety and durability. Common Anode Electrode: Utilizes common anode electrode technology, allowing the 2-color indicator lights to share a common anode electrode for efficient and convenient operation. . Package List: 4 x LED Indicator 4 x Compression Nut 4 x Washer Package List 4 x LED Indicator 4 x Compression Nut 4 x Washer