Item Type: Electric Hand Warmer Material: ABS Input Power: 5V 1A 5W Working Power: 3.7V 1A 3.7W Charging Time: 1.5-2.5 hours Working Time: 90-360 minutes Warmer Temperature: Low Temp 50, High Temp 55 Power Supply: 1 x 3.7V Lithium Battery, 2600mAh Capacity (built in battery) Package List 1 x Electric Hand Warmer 1 x USB Data Cable Please do not use while charging 1Shape and Light: This hand warmer has a unique cat claw appearance, ergonomic design for comfortable grip, built in colorful lights, which can serve as a small ambient light in the dark. 2Power Supply: This hand warmer has a built in 3.7V 2600mAh lithium battery, with Type C cable charging, fully charged for 1.52.5 hours, and continuously used for 1.56 hours. 3Temperature Gear: Long press to turn on and off, click to switch mode. The low temperature gear (50=120) is green light, and the high temperature gear (55=131) is multi color light. 4Excellent Materials: This reusable hand warmer is made of aluminum and ABS materials, lightweight and durable, equipped with a silicone rope that can be hung on a backpack as a decoration. 5Single Side Heating: This rechargeable hand warmer adopts a single side heating method, which is effectively energy saving, and suitable for outdoor fishing, travel, camping, skiing, cycling, etc. 6Warm Winter Gift: This cat claw hand warmer can effectively heat the palm of the hand and can also be used to relieve menstrual pain, making it suitable as a winter gift for family, kids, or friends.