Billing/Payphone with Double LCD Screen, <60dB Noise, 86 and 106kPa Atmospheric Pressure Country of Origin:China (mainland)Brand ... GPRS (optional) Supports PC fax (optional) Technical parameters: Atmospheric pressure: 86 and 106kPa Noise: less than 60dB Timing accuracy: less than ... to 90% Billing/Payphone with Double LCD Screen, <60dB Noise, 86 and 106kPa Atmospheric Pressure