They are placed in the trinket slot, which is independent from the player's main inventory and can only hold trinket items. Using a trinket does not break stealth .
Using a trinket does not break stealth . Trinkets can be found in the Vision & Trinkets category under Tools in the shop. All trinkets are totally free, and can be swap between each other for no cost.
Unique – Trinket: Reveals an area for 2 seconds. Enemy champions inside the area at the time of placement will be revealed for 5 seconds. This does not affect stealthed champions. Also places a visible Farsight Ward at the target location that lasts indefinitely ( 198 − 99 (based on average of all champion levels) second cooldown; 4000 range).
Since there is only one inventory slot for trinkets, a player can only own one trinket at any given moment. Trinkets can be used as soon as they are bought, even in the 30 first seconds for the game.
All basic Trinkets are granted lower cooldowns and increased effects as their owner gains levels. Additionally, you must reach level 9 or above in order to upgrade your basic Trinket into an advanced Trinket .
The current trinket slot. The fourth slot is responsible for holding trinket items. Trinkets are a category of items introduced in Season 4 and the preseason.