Compatiable with- the cell phone model with LG K40, LG K12 Plus, LG Harmony 3, LG Solo 4G LTE L423DL, LG Xpression Plus 2 (AT&T??with built in screen protector. Full coverage protection- provides protective edge around the screen, smooth soft rubber texture feeling and hybrid structures without making LG K40 X420 (2019 model) bulky. Durable and functional -all buttons and ports (sound, camera lens, charging, etc.) are still easily accessed with the case on. Smooth PC texture -The back is modestly grippy (doesn’t slide around too badly when set on its back) and slides easily into your pocket. Hands Comfortable- Texture with non-slip and rounded edge profile for enhanced comfort,Tactile buttons for solid feedback and an easy press.