Maxwest Astro 4 has display Size 4.0", operating system Android 4.4.2. The device has ram 512 GB too, card support is microSD, up to 32 GB, it has 4 GB, 512 MB RAM hard disk. Back camera 2 MP is awesome, front camera VGA is also not bad. Astro 4 has power storage, Up to 8 h. Device status is Available