Hive Beetle Trap Features:

Clamshell design for easy loading
Easy Open & Close
Heavy duty plastic for long lasting durability
Beetle can get in but bees can’t.
Use:

To help control beetles in your hive, place a bait of choice in the middle of the beetle barn and close the top. Place the beetle barn on the top of frames or on the bottom board. Honeybees tend to harass hive beetles and the beetles seek refuge in small dark areas.

One common bait used is Top Bait

https://www.hornsby-beekeeping.com/small-hive-beetle-trap-beetle-barn