Specifications:
- Frequency: 900, 1800, 1900 (please do not plug the CDMA SIM card for the device, it will not work with the CDMA card);
- Built-in microphone;
- 24 hours continuous usage (if plug to power);
- All GSM SIM card compatible;
- Microphone range: 10~12 meters (diameter);
- Receive sensitivity: -+ 10k;
- Working temp: -40~50 degrees C;
- Stand-by time: up to 36 hours;
- Transmits audio via GSM cell phone network up to 40 minutes per charge
- Dimension: 4.2 х 3.5 х 1.7 cm;
- Do not insert the SIM into the slot in the wrong direction;
