The phrase "vibration levels" refers to the measurement or intensity of vibrations in an object or environment. It indicates how strong or intense the vibrations are. Full definition
You can also set an alarm tone along with vibration level. (technowize.com)
The app also adds a few convenience features, like being able to set watch vibration levels and activate the find - my - phone function from the watch. (cultofmac.com)
The 4Moms bounceRoo Bouncer Seat offers 3 unique vibration levels for your baby and you can change it using its intensity settings. (babieslounge.com)