Xiaomi redmi 4 is middle range smartphone.it has very powerful specification.it come with 4gb of ram and powered by Qualcomm Snapdragon 435. 1.4 ghz octacore processor.it has a larger battery of 4100mah that gives two day battery backup.it has a metal body.Most of sensor are in it like light sensor fingerprint scanner etc.it also come with IR blaster.it is a remote control function which contro led lcd tvs dth cable etc.it has primary camera of 13mp with 2.2 aperture and secondary camera of 5mp.Secondary camera is not good in low light.