LIGHT AND PORTABLE: Made of aluminum alloy and high quality PC, very durable, compact and elegant. Have an absolutely excellent Contact feeling. Perfect compatible with indoor and outdoor use, easy to transport. NO MORE COLD: Can heat up quickly in seconds and immediately give off heat compatible with you, a great winter companion that always keeps your hands warm PERFECT GIFT: Best gift ideas in cold winter. Perfect compatible with family and friends, Christmas, New Years or Winter SAFE: Optimized circuits extend the life of the pocket hand warmer and offer protection against overdischarge, overload, overheating and short circuits. Battery capacity: 4000mAh Heating power: 10W Heating temperature: 40-60 Power:USB charge colour: white/blue/pink Material: PC+aluminum alloy Size: 11 x 10 x 6CM Package Contents: 1 x Hand warmer 1 x USB data cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.