There is nothing wrong with this product. These filters cost half as much as if you ordered them directly from the manufacturer. They trap dirt and debris, and the new one cools the engine instead of warming it up. Depending on the environment you live in (pets, desert, etc.) they may need to be replaced more frequently, so it's always a good idea to have a spare. For the price it's not a problem.
Blue OKP Life K2 Robot Vacuum Cleaner with 1800mAh Battery
5 Review
Efficient iRobot Roomba 694: Robot Vacuum with Wi-Fi 🤖 Connectivity, Ideal for Pet Hair, Carpets, Hard Floors, and Self-Charging
3 Review
🌀 Dirt Devil Endura Reach UD20124: Powerful Bagless Upright Vacuum Cleaner in Red
3 Review
🧹 eufy BoostIQ RoboVac 11S (Slim) - Super-Thin Robot Vacuum Cleaner with 1300Pa Strong Suction, Quiet Operation, Self-Charging, Ideal for Hard Floors and Medium-Pile Carpets
6 Review