Cross compatible to fit both the A11 and A21

Easy Installation: Attached smoothly with self-adhering surface, leave no residue when removed. Easy and quick install without any bubbles.

Compatibility Mode: Precision cut to specifically fit. Feel like on the original touch screen.

Durable Scratch Resistance: Highly durable, and scratch resistant - 9H+ hardness, Featuring maximum protection from scratches, scrapes, and bumps and protects against sweat and oil residue from fingerprints.

9H Hardness screen protector can effectively protect your  from unwanted scuffs and scratches by knife, keys and some other hard substances

High touch sensitivity. Ultra thin-0.3mm thickness is reliable and resilient, and promises full compatibility with touchscreen sensitivity