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