Warm your hands in just 5 seconds with three adjustable temperature settings: 104°F, 122°F, and 140°F. Choose the perfect temperature for your needs. The charcoal-flame ambient light creates a stylish design, providing tangible warmth. A built-in LED digital display shows the remaining battery charge or temperature. This rechargeable electronic hand warmer lets you check the remaining battery level and provides ample power for your smartphone, tablet, or any other USB-powered device. This lets you plan ahead and ensure you're always warm when you need it. Each hand warmer is equipped with a high-capacity 3600mAh battery. This rechargeable hand warmer provides up to 8-20 hours of warmth in the coldest winter weather. Whether you're out skiing all day or just taking a quick stroll, your hands won't get cold. Our electronic hand warmers are lightweight and compact, making them easy to carry. They won't weigh you down or take up too much space in your bag or pocket. Their ergonomic design fits perfectly in your hand, providing a comfortable grip that won't fatigue your hands. This stylish pocket hand warmer is easy to hold, provides smooth warmth, and is compact, palm-sized, and lightweight. It's perfect for taking with you to work, walking the dog, camping trips, watching a game, or even hunting in the winter. It provides warmth. Dimensions: 10.5 x 6.2 cm Material: ABS + aluminum alloy Working time: 2.5-12.5 hours