... :Wireless communication 3:Friendly software 4:High waterproof 5:led cross signs LED Pharmacy Cross DisplaySpectification1:Many Size(40cm,60cm,80cm,100cm,110cm,120cm and ... ) or aluminum case6:RF Wireless communication and RS232 serial calbe7:Cross working enviroment:-15 to +60,10% to 90%RHCertification:CE ... .or he can aslo modfiy them before display Full Color LED Pharmacy Cross Signs