Idethi iwuhlobo lwesitembu esinombhalo wedethi, ngokuvamile osesimweni sombhalo wedethi +. Idethi ingalungisa isikhathi sosuku ngokuthanda kwakho. Njengamanje, isetshenziswa kakhulu emabhange, ezikoleni, ezibhedlela naseminyangweni kahulumeni lapho izinsuku nemiyalelo yombhalo idinga ukumakwa njalo.

Isitembu sedethi esilungisekayo sidinga ukusetshenziswa netafula lokuphrinta, futhi umbono ophelele ungatholwa ngokunamathisela uyinki ngobumnene. Kusetshenziswa ubakaki wensimbi engagqwali, uhlaka luzinzile, futhi indawo yesitembu nayo yenziwe nge-alloy material, okwenza sonke isitembu sizinze futhi siqine. Usuku lwesitembu luyalungiseka iminyaka engu-12, futhi indawo yokunyathelisa ingenziwa ngokwezifiso noma ishintshwe ngokuvumelana nesidingo. Usuku lophawu lungalungiseka iminyaka engu-12, futhi indawo yokunyathelisa ingenziwa ngokwezifiso noma ishintshwe ngokuvumelana nesidingo. Singakwazi futhi ukuhlela ngendlela oyifisayo ukuhlelwa kwe-DD-MM-YY noma i-MM-DD-YY nokunye okuhlukile konyaka, inyanga nosuku, noma umbhalo ngezilimi ezahlukene ngokuya ngezidingo zamakhasimende.

Idethi yomkhiqizo we-LIZAO inezici zokuthi ubude obuhlobene bedethi obungokoqobo kanye netafula lesitembu kungalungiswa ngokuqhubekayo, okuthuthukisa indawo yonke ye-sta,[ surface, futhi lenze usuku lube ngokoqobo kanye nendawo yesikhumba yesitembu ilinganiswe ngokunembile, ihlangabezana nezimfuneko zokucaca kwesitembu ngezinga elikhulu kakhulu.