... 3)With CE,CCC,ISO9001,ect The size of the key switch ( lock box )is about 15*9*5 ... other style.Clutch lock(contain clutch line) ;Adopt Manual operation;When the remote control can't used,you can ... use key switch for opening roling door. "Pursuing quality,permanent ... regards, ----ZhangZhou JinAn Electric & Machine Co.,Ltd. Stainless manual Key switch ( lock box )