Igalaji(ukude kwesicabha segaraji）ikakhulukazi ihlukaniswe ngokulawula okude, ukungeniswa, ugesi kanye nemanuwali, futhi isilawuli kude somnyango wegaraji iyithuluzi lokulawula ukude ukuvulwa nokuvalwa komnyango wegaraji. Sengisho nje,iremote yomnyango wegarajingokuvamile zisebenzisa isilawuli esikude somsakazo kusilawuli kude kunesilawuli esikude se-infrared, ngoba uma siqhathaniswa nesilawuli esikude se-infrared esivame ukusetshenziswa ezintweni zikagesi zasendlini, isilawuli kude somsakazo sinezinzuzo ezilandelayo.Isilawuli kude somsakazoisebenzisa amaza omsakazo ukudlulisa amasignali okulawula. Izici zayo azikho ukuqondiswa, akukho ukulawula "ubuso nobuso" kanye nebanga elide (kufika emashumini amamitha, noma amakhilomitha ambalwa) futhi sengozini yokuphazamiseka kazibuthe. Kulula ukusebenzisa isilawuli kude somsakazo ezinkundleni ezidinga ukungena kwebanga elide noma ukulawulwa okungaqondile, njengesilawuli kude somnyango wegaraji, isilawuli sezimboni, njll.
