... Waterproof:IP65 - CE,ISO9001,ISO14001 - T/T P25 Square LED Sign Specification:ZD-P10, ZD-P12, ZD-P16, ZD-P20 ... combination at wills, convenient debug and maintain; 7. Round-the-clock work, dustproof, antisepsis, waterproof, damp proof, thunder proof, ... are free of charge.3.The counseling service of LED display are free of charge.4.The maintenance ... , not easy to become deformed . P25 Square LED Sign