Using high-tech aviation-grade aluminum and ABS material, it is smooth and warm, portable and compact, and non-slip in one hand. Patients who need hyperthermia. Fast heating and 3 levels. Press the switch to release the warmth for you instantly. Quickly preheat both sides in a few seconds. 3 levels of temperature for you to choose. The 4000 mAh lithium rechargeable battery with USB charging port can also be used as an emergency power source. Diversity and the best technology gifts. Quick hand warmer and mobile power in one. It is not only a small hand warmer, but also an emergency backup battery. A great gift for girls, children, youth, boys, men, women, and the elderly, especially for Raynaud’s arthritis. Add your logo to the grand opening ceremony and various social.