[Fully sealed] The construction work offers long -term durability and reliability. [Small Power Supply Interference] reduces the influence on the scanner and ensures large advertising boards and light boards. [ change in the entrance] does not provide a high level of electricity at the start, which improves the lifespan of the transformer and the scanner. [Abnormal status protection] Protection against input overvoltage and overheating, which ensures secure operation. [ and moisturizer] Construction suitable for outdoor use in all weather conditions.