Made in UK with large battery, sensitive dual microphones and high gain antenna for improved enhancement. These have minimum echo or interference noise clearly hearing conversation over a large area. It is even possible to hear voices from adjoining rooms if door is open or sound can travel.
This model is the real thing and not to be compared with China products. PLEASE NOTE - This device is tested and fitted with EE PAYG SIM card ready to use. From new it will need charge before use. Full instructions on how to do this and operate listening is included. It does not need any credit to operate and calls are charged at local network tariffs.In most cases this is completely free to call in and use for long durations. Fitted with ultra long life 2500mAh lithium battery with 30 day standby and a full 24 hour in use time. Battery is charge from inside the calculators AA 1.5v battery compartment which is required to use calculator. Totally discreet and impossible to know it is a listening device as nothing is visible from outside. Listen in on conversations up to 7 metres away from the calculator for up to 30 days.
Sound activated can be set if required and any sound above 40db is heard the calculator will call your number. This feature can be switched off if not required and only works if credit is available on sim card.
Credit is added to sim card by using kwikpay service or similar app without need to remove sim card. GSM band module: 900MHZ, 1800MHZ. Microphone Range: 5-7 metres (Radius).Charger power: USB 5V / 1A. Dimensions: 200mm x160mm x 50mm. 1 x Calculator GSM listening device. The item "SOUND ACTIVATED WIRELESS GSM AUDIO LISTENING SPY BUG DEVICE IN OFFICE CALCULATOR" is in sale since Thursday, March 28, 2019. This item is in the category "Consumer Electronics\Surveillance & Smart Home Electronics\Home Surveillance\Home Surveillance Parts & Accessories\Other Surveillance Parts & Accessories". The seller is "micronic007" and is located in Winchester. This item can be shipped to United States, United Kingdom.