phone billing meter-TPJ500-(4 LINE)/pay phone billing meter

Specifications:
1) Height: 15mm
2) Width: 70mm
3) Depth: 255mm
4) Weight: 0.95kg
5) Display operator: Character LCD with backlight
6) Customer: 3-line character LCD with backlight
7) Keyboard: Six function keys
8) Dialing method: DTMF
9) Access: PSTN, GSM, VOIP
10) Power: AC 220V, 50/60Hz, DC 9V, 5, 504mAh
11) Battery: Fully charged battery supports 16h calling

Conditions:
1) Environment: Away from rain, sun, high temperature, dust, alkali, acid,
Strong vibration situation or strong electromagnetic wave
2) Atmospheric pressure: 86KPa - 106KPa
3) Relative humidity: 10% - 90%
4) Noise: <60dB
5) Temperature: -10 degree - 40 degree
Technology standards:
1) Timing accuracy: <1 sec
2) DTMF receiving standard:

1) phone billing meter have console and remote display box
2) can connect GSM, PSTN, VOIP