* Dimensions : 50mm x 40mm x 15mm
* SIM Card slots - work with all GSM sim card
* Embed condense microphone.
* Microphone range: about 20 Meters (diameter)
* Receive sensitivity: -\+ 10K
* Working temp: -40~50 degree C
* Responding frequency: 1.2K~800Khz
* Stand-by time: 3-5 days (using voice control function);6-15 days ( don’t use voice control function);30-40 hours (flashlight available)
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