Hand warmer and mobile power supply 2 in 1. It is not , but also an emergency backup battery. It is small in size and easy to carry. The best gift for family and friends. The 3000mAh battery capacity can provide up to 5 hours of heating time, which is enough for most winter outdoor sports or sports. It can also relieve the symptoms of Raynauds. Constructed from ABS. Anti-vibration, anti-scaling, explosion-proof, anti-radiation. Completely safe heat transfer. The hand warmer adopts double-sided heating design, which can switch from the charging to the hand warming mode in 3 seconds, bringing you warmth in winter. 3 gears that can adjust heating at any time When you feel overheating, hand warmer has an overheating protection function that 't worry safety,or using the small bag we presented, which is very safe and reliable. Portable charging hand warmer compatible with , Galaxy, , other Android phone and Tablet PC. Colour:pink Material:ABS Size:109 x 69 x 41mm Package Contents: 1 x hand warmer 1 x USB cable Only the above package content, other products are not included. Note: Light reflection 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.