USB Charging Hand Warmer Charging Treasure Temperature Control Double-sided Heating Mobile Power Hand Warmer Two-in-one Features: USB charging,support a variety of charging ways,you can charge anytime,anywhere. Small and exquisite,you can take it with you anywhere.Three seconds to heat quickly,no need to wait for warmth. Instant heat in 3 seconds,double-sided fast heating,uniform heating effect. It is not just a power bank,but also a hand warmer. The design has a cute personality,warms your hands and warms your heart,and sends the warmth of your hands to your family and. 1.Long press the button to open or close the heating function,the first gear 52-60 °C,the second gear 40-50 °C,the third gear 34-40 °C.2.Second speed flashing two red light heat moderate.3.A steady red indicator generates more heat.4.Three flashing red indicator light heat is small. Product Description: Product specification: 12*5.9*2.4cm Power supply: USB Rated voltage: 5V Package includes: 1 hand warmer,1 charging cable