Intelligent safe heating and reusable long-lasting heating, intelligent aggregation chip, protect the core link; automatic power-off protection to prevent overcharging; and the heating piece and the hand warmer are isolated from the design to prevent short circuit and explosion problems. 4000Mah large capacity battery. Low-grade: constant temperature of 45 high-grade: constant temperature of 60. Heat quickly in 3s, and reach high temperature in 30s; 47-52 continues to cycle to give you warmth. Intimate design, perfect to provide perfect heat for hands. Intimate design: light and compact, portable, just right to hold, ergonomic design; portable lanyard, non-slip and anti-falling, not easy to lose; surface comfortable paint, baby skin feel. The heater and charger are combined into one. It is very convenient on cold days. It can not only be used as a hand warmer to give you warmth and care in winter, but also can be put in a bag as a , which is very convenient. Simple and practical, suitable for this winter. It is more portable and smaller than the ordinary mobile power supply, and the capacity is enough to charge the mobile phone. Can be used in various . It is very suitable for frequent outdoor work, fishing, hiking, camping, skiing, travel, school, sports, etc. Delivery quantity: 1pcs Product colour: blue Product size: 102*55*36mm