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Specification:
1.Frequency: GSM 900MHZ,1800MHZ,1900MHZ
2. Card Compatible: GSM SIM Card .
3. Microphone Range: 5m-7m(Radius), 4 levels.
4.Stand-by Time: 3 days (Full charge) Can be charged by USB on a computer or plugged in main power.
5.Working Time: 4 hours continuous Monitor.
Specifications:
1.Simply insert a SIM Card into the device, hide it in someone's bag or place it under a table, it'll work anywhere.
2.Call the number and listen to the surroundings.
3. There is no speaker or LED notification when you call so whoever you're monitoring will never know they're bugged! Cool Features Call the device from anywhere in the world.
4.then you can hear the voice around Super mini size, roughly the size of two quarters.
5.Battery can last 3 days on standby.
6. Additional features - Sound filtering, perfect audio clarity, free of interference. - Four condense microphones embedded. - Battery lasts 3 days on standby. - Battery life can support 5 hours of continuous surveillance