Warm tips:* please fully charge the product for 120 minutes before the first usage.* Please fully charge the product brfore each use to ensure continuous pleasure.* Do not use alcohol, gasonline or acetone cleaners.* Do not put the product directly into boiling water to clean it.* Avoid direct sunlight and do not expose the product to high temperature environment.* Do not use the product under swollen or damaged skin.* For adults only, please keep the product out of the reach of children.