Spy GSM Credit Card Size With Invisible Earpiece

Feature:
Size: 85 x 50 x 4.5mm(L x W x H) Like an Card
Weight: only 30 grams
Built-in induction

Manufacturer description:
Once insert a GSM SIM card and turn on the power, it will automatically pick-up calls from any mobile phone or telephone.
Two way covert communication via mobile phone networks
Optimized inductive coil creates strong power for earpiece
Size 85*50*4.5 mm
1-2 hours talking time

How does it work?
The new developed GSM BOX has a built-in dual band GSM module that works in both of Four Band mobile phone networks.
Once insert a GSM SIM card and turn on the power, it will automatically pickup calls from any mobile phone or telephone.
The powerful inductive coil will creat strong signals to drive earpieces within 10-20cm distance.
GSM BOX has a built in rechargeable 650mAh battery. supports more than 1-2 hours talking time.

Package/List of Accessories:
1 x IMEI Unique New 4.5 W GSM-ID-Card ( will send random card).
1 x USB charger cable
1 x Operating english Manual