... ) (1)WH-2321L,WH-2321L,WH-2321L,WH-2321L(7-inch LCD screen,Aluminum panel,mechanical buttons)WH-2321Y,WH-2321Y,WH ... to I series products2,Equipment featureshigh-grade panel material, Large LCD display, Luxury, Generous;Functions Full-touch operation, Easy to ... ordinary telephone intercom..low-power design, which is energy-saving, reliable and has a long service life;LINUX platform architecture, with ...