Provide three temperature settings of 45℃, 55℃, and 60℃ to meet the warmth needs of different environments Make of ABS to ensuring wear and drops resistance, suitable for long-term use The unique design allows you to combine two hand warmers into a large, or use it separately to share warmth with others Suitable for couples and friend to share warm during outdoor activities The compact and light weight design makes it easy to carry to any place, whether it ' s commuting or traveling, it can be easily placed in a bag Built in 3000mAh battery without frequent charging, especially suitable for long-term outdoor activities or travel