【UPGRADED SOUNDPROOFING SYSTEM - FOR MULTIPLE SCENARIOS】 This male stroker has been upgraded with soundproofing materials to bring its sound decibels to an unprecedented level. Unlike traditional heating rods, this upgraded system ensures all-around even heating inside the silicone sleeve for a more realistic vaginal simulation experience, which can freely travel between 77℉~108℉, you can always find a tailor-made temperature that suits your body sensation.