Supply four billing initialization modes, that is polar-reverse, 16KHz pulse signal, manually and delay automatically charge.
Supply pre-payment option, including sum set and payment calculation after a call.
Supply in-coming-call free or charge.
Powerful statistic and print function.
Store up to 3,000 phone bills, daily records for the latest 100 days.
Supply multi-operator mood.
Transmit tariff rate, clock, initialization and upgrade program rapidly by Serial Communication Tool.
Rechargeable battery lasts up to 8 hours.
Each phone line has a remote display for a caller.