Have a look at this newwest Multi functional Calculator Gsm Listening devices, it is Disguised as a calculator, and the use of calculators can be normal. But more important of all, it can be used as Listening Device, Easy to operate, Just insert a sim card into it, You can hear the sound around the device. Besides, It is also with dual power sources(Solar energy and LIION battery)to charges.

Feature:

1.Calculator GSM listening device.

2.Disguised as a calculator, and the use of calculators can be normal.

3.Built in adjustable sensitivity voice active microphone.

4.Built in High sensitivity monitoring amplifier microphone

5.Easy to operate, just install SIM card and call it.

6.Built in rechargeable polymer LIION battery.

Specification:

*GSM band module: 900/1800/1900

*Voice sensitive: -75db

*Standby power consumption: 6mAh

*Working power consumption: 280mAh

*Power: 3.7V 280mA

*Stanby time: Up to 15days

*Charger power: 5V DC

*Dimension: 200x160x50mm .

Package Contents

*1 x Calculator GSM listening devices

*1 x USB Cable

*1 X Screwdriver.

*1 x Charger.