... ,support display,printer,remote management by SMS or GPRS.Billing Meter Wireless Billing Meter Unique Functions 1).Support GSM network and PSTN line ... , lock location, lock network and setup password to protect the meter.4).Double LCD screen, English operation menu, display call number ... °C~+55°CRelative Humidity: 10%~ 95%Atmospheric pressure: 86KPa ~ 106KPa Wireless Billing Meter