Wristwatch Shield

The Wristwatch Shield is a gift given to Percy Jackson from his Cyclops half-brother, Tyson.

Description
It is a shield that is magically encased within a watch. When the button on the side of the watch is pressed, a full shield spirals outward, resembling a camera shutter. When expanded, the strap of the wristwatch becomes a leather brace that wraps around the user's forearm. The shield is polished bronze, has the width of four feet, and inside of the shield is coated in a soft leather. It has a series of engravings on it depicting the events that took place during the The Sea of Monsters. The pictures include Annabeth slaying a Laistrygonian dodgeball player, Percy fighting the bronze bulls on Half-Blood Hill, Tyson riding Rainbow toward the Princess Andromeda, the CSS Birmingham blasting its cannons at Charybdis, and Tyson battling the Hydra, as he held aloft a box of Monster Doughuts.

The Sea of Monsters
At the beginning of the second Chariot Race, Tyson gives Percy a wristwatch and tells him to press the stopwatch button when he needs it. When the Hephaestus Cabin's chariot attacks Percy, he pressed the button and the shield opens up to defend Percy and Annabeth, destroying Beckendorf's sword in the process.

The Titan's Curse
Percy brings the shield out to defend himself from Dr. Thorn, who's tail managed to create a huge dent in it. Percy later contacts Tyson to tell him that it was damaged and Tyson offers to mend it for him.

The Battle of the Labyrinth
When Percy enters the Poseidon's Cabin, Tyson is already there and presents it back to him along with a herd of mini bronze hippocampi on the ceiling. It was unfortunately lost in the Labyrinth when Percy hurls it at a Kampê, to allow Tyson to escape.

The Lightning Thief (film)
The shield is not a wristwatch, and is given to Percy by Luke, which is not a and the Lightning bolt is hidden in the shield 's arm-grip instead of in Ares' backpack.