1. Cov khaub ncaws zoo ib yam tsis muaj qhov cuam tshuam, yog li nws tsis yooj yim rau kev nyiam cov neeg tsav tsheb hauv qhov tsis pom kev. Yog hais tias qhov ceev ceev los yog tus neeg tsav tsheb tsis xyuam xim, kev sib tsoo tsheb yuav tshwm sim heev. Thaum tus neeg tsav tsheb ntsib lub tsheb sib tsoo thiab yuav tsum tau nres ntawm txoj kev, yog tias nws hnav lub tsho tiv no, qhov ua tau ntawm kev sib tsoo yuav raug txo kom tsawg.
2. Cov khaub ncaws zoo li feem ntau yog ua los ntawm cov xim fluorescent, thiab cov xim fluorescent ci ua rau muaj kev sib txawv zoo nrog ib puag ncig ib puag ncig thaum nruab hnub, uas tuaj yeem ua rau lub sijhawm ua rau muaj kev xav ntawm lwm tus neeg tsav tsheb dhau los. Thaum tsaus ntuj lossis thaum pom kev tsawg, nws muaj 360-degree loj-qhov kev xav. Nyob rau hauv cov xwm txheej ntawm lub teeb taub hau, nws tuaj yeem ua rau muaj kev kub ntxhov ntawm cov neeg tsav tsheb thiab cov neeg nyob ze ntawm qhov deb, txo cov kev sib tsoo tsheb thiab pab txhawb kev tshawb nrhiav.
Yog li ntawd, yog tias koj xav tau tawm ntawm lub tsheb rau ib yam dab tsi, koj tuaj yeem hnav cov ris tsho zoo nkauj. Cov ntaub npog ntsej muag ntawm cov khaub ncaws yuav cuam tshuam lub teeb rov qab raws li cov kev taw qhia ntawm lub teeb ci. Nyob rau hauv txoj kev no, lwm tus neeg tsav tsheb hla tuaj yeem pom koj lub xub ntiag ntawm qhov deb, kom lawv muaj sijhawm txaus los ntsuas qhov cuam tshuam kom zam, yog li txo qhov zaus ntawm kev sib tsoo tsheb.