... 4-tarrifs3) Auto-billing function: 2 billing ways (monthly billing, weekly billing), and each billing ... , meter state and setting parameters and others, two ways of display can be chosen by users5) Parameters ... select PC or palmtop to program, these two programs will prevent un-authorization operation in order ... protect data safety6) Reset function: 4 reset ways of manual, RS485, infrared, automatic to be ...