VIKTOR JURGEN back massager settles within 15 minutes over-heating auto-shut-off protection. Massage pillow also comes with a high-elastic shoulder strap with 3 Velcro Suitable for most chairs. Shiatsu Massager is conveniently portable and can be tucked into your work bag or backpack as you travel or commute. Back massage is the perfect gift for dad, mom, women, men, wife, husband, and all of your loved ones. Back kneading nodes double the AC Car Adapter Input: AC 100-240V / 50-60Hz DC Car Aux Outputs: DC 12V.