Features - 2 to 3 hours battery backup GSM SIM supported - 2G/3G Or 2G/3G/4G ( Hybrid) - Only 4G will not support ( JIO )Powerful MIC 57dBHow to use -Charge the device for 4 to 5 hours for the 1st time ( make sure the device is off while charging ) After charging is complete turn it off then insert SIM and again turn it ON and wait for 1 to 2 minutes. After the gap install cell into the earpiece. Now the device is ready to use. The earpiece will connect automatically. Now make a call to the particular SIM number that you used in the device. That's all.

Package contains - 
1 Surgical mask 
1 Earpiece Electronic
2 cell for Earpiece 
1 Charging cable 
1 Charger 
 
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.