backlit LED letter 1. mirror stainless steel on the face and white acrylic side 2. fine welding 3. inner high quality waterproof LED (with CE/UL/ROHS certificate) ,over 50,000 hours guarantee. 4. Uniform lighting, fresh colour 5.Safe voltage-DC12V 6. Ametabolic, waterproof, fireproof, corrosion resistance 7. Accept customization 8. back screw rods fixing