Repulsion Shield

You gain a +1 bonus to Armor Class while wielding this shield. The shield has 4 charges. While holding it, when a Large or smaller creature within 5 feet of you hits you with a melee attack roll, you can take a Reaction to expend 1 of the shield's charges and push the attacker up to 15 feet straight away. The shield regains 1d4 expended charges daily at dawn.

Shields require the Utilize action to Don or Doff. You gain the Armor Class benefit of a Shield only if you have training with it and are holding it.