Strontium recently launched their new range of MicroSDHC cards called Nitro Plus. The Nitro Plus MicroSDHC card is classified under the Ultra High Speed Class 3 specification UHS-1 (U3) for 4K Ultra HD high resolution standard (3840×2160) and hence it has a write speed of at least 30MB/s and read speed of at least 80MB/s.
For the 16GB, 32GB and 64GB, you will get a read speed of about 80MB/s. For the write speed on the 16GB, you will get about 40MB/s and for the 32GB and 64GB you will get a speed of about 60MB/s.
In my test for the 32GB, I managed to get a write speed of about 51MB/s and a read speed of about 87MB/s, you can checkout the screenshot below.
The default packaging includes a MicroSD to USB adapter and a MircoSD to SD card adapater. It also includes a full version of MyBackup Pro, which is an Android Backup application, worth USD$4.99/SGD$6.37.