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high temperature quenching to improve hardness
BT version: BT 4
can increase the air breath for sleeping
It is perfectly line up with the airplane seat height
2 In 1 Hand Warmer And Power Bank Car Engine Seal Flat Ring high temperature quenching to improveDescription: 2 In 1: Quick hand warmer and power bank 2 in 1. It's not only a little handwarmer but also an emergency backup battery. 3 indicator lights keep you informed of the remaining battery and heating status. 3 Temperature Settings: You can adjust the heat setting on your Hand Warmer by pressing the button to switch from one setting to the next. The highest temperature is 140 F 60 C, the middle temperature is 122 F 50 C, and the lowest is 104 F
