Featuresr it is specially designed for samsung galaxy s3r ultrathin design compact and light weight without increasing additional weight of the s3r adding wireless charging feature by piggybacking it on the battery of s3 it works well with any qi enabled chargerr easy to user the receiver can be attached to the the battery all the time and it would not interrupt the normal use of the s3r r how to use it r step 1 open the back cover of the samsung galaxy s3r step 2 stick the receiver