key switch ( lock box ) 1)Specialized for Anti-theft rolling door ... steel,durable 3)With CE,CCC,ISO9001,ect The size of the key switch ( lock box )is about 15*9*5.5(cm ... ;When the remote control can't used,you can use key switch for opening roling door. "Pursuing quality,permanent and continuous ... Best regards, ----ZhangZhou JinAn Electric & Machine Co.,Ltd. Stainless manual Key switch ( lock box )