This powerful hand warmer is your best bet if you’re looking for a device to warm your hands as well as charge your phone. It features 3 heat settings reaching 140℉ and can run for up to 12hrs on the lowest setting. This warmer can serve as heat therapy for people with rheumatoid arthritis, Raynaud’s, and menstruation. It also works as a power bank for electronic devices thanks to its large capacity battery. Simply slide into your gloves or pocket to keep your body toasty during cold winter. Moreover, the sunset light creates a relaxing and elegant atmosphere for you.Fast Heating & 3 Heat Settings - Just turn on the warmer and its double sides will get warm in 3s. Featuring 3 levels(40℃/104℉; 50℃/122℉; 60℃/140℉) and digital display, you can freely and precisely choose the desired temperature to quickly warm up your body.Heat Therapy& Sunset Light - This warmer can serve as heat therapy for people with rheumatoid arthritis, Raynaud’s, and menstruation, effectively alleviating pain and aches. With palm size and pebble shape, it means you can easily apply the warmer to warm up your hands, feet, knees, waist, and back. Keep your body toasty during the cold winter. Moreover, the atmosphere light can cast stunning sunset on the wall, elegant and relaxing. Light up your mind on those gloomy days!Superior Safety - Advanced intelligent protection system keeps your warmer away from short-circuit or over-loading. No need to worry about burning in your gloves or pocket on the go.Large Capacity Battery - Built-in 6000mA batter offers 5-12hrs warmth for you, ideal for camping, fishing, hiking, skiing , and other outdoor activities in winter. Besides, it also can be used as an emergency backup battery phone charger.Real Comfort - Made of high-tech ABS material with thousands of polished surface, it is smooth, warm, portable and compact as well anti-skid in one hand.