Features:
1) GSM / PSTN access support
2) Dynamic echo cancellation
3) PSTN pass-through support when power down
4) Network management support
5) LCD display
6) Caller line identification
7) Intelligent call routing
8) GSM / PSTN bidirectional call divert
9) PBX trunk connection or extension connection
10) Networks support: GSM 900 / 1800
11) Operating temperature: 0% - 55%
12) Voltage: AC 9V
13) Backup battery: lithium battery 3.7V, 1,100mAh
14) Compatible with Nokia 3310 / 3330
15) Adapter voltage: AC 50Hz + 1%, 220V + 10%
16) Standby time: 48h
17) Talk time: 2- 6h
18) Charging time: 6h
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