Features:

Long Time Keeping Warmth: 5 seconds of rapid heating, three gear temperature adjustment, and lasting 5 hours of warmth, so that you can keep your hands warm in cold weather.

Multi Function: Double-sided heating, two in one charging hand warmer. It's not only a USB rechargeable hand warmer but also an emergency backup power supply.

Easy to Carry: Lightweight and palm-size, it's comfortable to hold and portable for outdoors to keep hands warm in winter, and provides backup power source for your cellphone.

Occasion: Keeping hands warm indoors or outdoors for shopping, camping, hiking, skiing, fishing, traveling, etc.

Perfect Gift: This portable hand warmer is a warm gift for your friends, family, boyfriend and girlfriend. Wherever they are, they can keep their hands warm with this warm gift.

1st press (long press) - will switch it on and is the low setting (1 orange and 2 green lights)
2nd press - is the medium setting (just red lights)
3rd press - is the high setting (just green lights)
Long press - will switch it off

Specifications:

Product Name: Potable hand warmer

Product Material: Aluminum alloy, ABS

Product Weight: 150g

Product Size: 10.2 * 5.88 * 2.4cm

Product Function: Double-sided heating hand warmer in winter, mobile power charger

Product Life: About 1-3 hours of continuous life (depending on power consumption and storage)

Product Gear: 3rd gear adjustment

Packing includes：

2*Hand Warmer

2*Charging line

2*Instructions