GSM DUAL SIM BASED - BOX with Spy earpiece
This device is very compact in design and very easy to use. It supports all the GSM SIMs except JIO. 
It's having auto call receiving functions and also having a battery backup of 8 hours. The earpiece is very small in size and will not be visible from outside.
Earpiece cell works  4 hours. After every 4 hours, you will have to change the cell with a new one.
The distance between earpiece and the GSM box needs to be 20 to 50 CM.
 
Package contains -
One GSM box 
one earpiece 
one charging cable 
two earpiece cells
 
Cautions - 
Don't use this earpice for longer time. 8 to 9 hrs is maximum use time since it's electromagnetic ways might harm if exposed for longer durations. 
Never sleep with earpiece in your ear
Do not insert forcefully. Don't push the earpiece as they might harm your ear canal/drum. 
The buyer shall not use the product for any illegal purposes and shouldn't permit anyone to use the product in any kind of unlawful activities. We promote our products for betterment for our lives not to go against law, or humanity.