Check the pressure release and stop controls
Use the instructions for the exact model and practice off the body.
Check how pressure is released
Find the maker’s instructions for stopping suction or releasing a seal. For a powered device, confirm whether the stop button also stops vibration. Test the documented controls with the device away from the body and keep them within reach.
Check what happens when power changes
Read how the device behaves when switched back on and whether it remembers a setting. Check the charging instructions and avoid relying on a depleted controller. Stop if the device causes discomfort or does not behave as the manual describes.