It has a 2010 Mah battery and it supports micro SD card with this device you can have voice calls on 3g handset also you can connevt this devices with 31 devices in one go( as per box instructions) . it is a bit tiny device.it has a device and a charger in box a USB cable and a wall plug battery has 5 volt 1 ampere.it comes up with a microsim adapter to full screen adapter which is a good thing. every functions shows up with a led light on device like power on/off charging etc. internet speed in this device is too good but sometimes network problem comes with jio then it shows a slow speed.