Cov khoom no tsuas yog cov neeg siv khoom cov ntaub ntawv tso tawm, tsis yog muag, thiab siv xwb.
Built-in microprocessor;
Txais yuav tsis-polar ob lub tsheb npav tshuab, qhov siab tshaj plaws kev sib txuas lus tuaj yeem ncav cuag 1500m;
Lub voj voog tsheb yuav tsum yog khub twisted, thiab qhov chaw hla ntawm cov hlau yuav tsum tsis pub tsawg dua 1.5mm2;
Electronic coding method, uas tuaj yeem hais los ntawm lub tshuab hluav taws xob tshwj xeeb;
Nrog kab txhaum kev ua haujlwm