2 in 1 retro heater usb charger output portable external battery hand warmers 5000mah power bank for christmas gift

Overview:

Q1: Only one side or both sides?
A1: Warm the whole hand.
Q2: When will the hand warmer reach 52℃?
A2: When the hand warming mode is turned on, the real-time temperature will be displayed, and then it will be heated to 52℃, which takes about 30s-1min, and then kept at 52℃. (If the room temperature is too low, the heating time will be longer, which is normal.)
Q3: How long will the hand warmer heat up?
A3: After fully charged, it can be kept at 20℃ for 3.5h to 4.5h.
Question 4: Is it safe to use?
A4: The temperature is automatically controlled by the chip during charging, and the flame-retardant ABS material can also prevent high temperatures.
Q5: How to change the hand warmer mode and mobile power mode?
A5: There are 2 buttons on it, press and hold the right button for 3 seconds, it will start to display heat and digital temperature. Press the right button at the same time for 3 seconds to turn off the heating mode. Press the left button to turn on the mobile power mode and digital battery display.
Q6: How to charge?
A6: There are 1 input and 1 output interface on the right side. There will be a micro usb cable for charging in the package.
Q7: Why does the temperature decrease after 52℃?
A87 has a high temperature protection function. When the hand warmer reaches 52℃, it will stop heating. If you think the temperature is not high enough, you can turn it on again.

Specification:

Material: flame-retardant ABS, high thermal conductivity aluminum alloy
Battery capacity: 5000mAh
Input: 5V / 2A
Size: 69 * 74 * 34mm
Function: hand warmer and charging mobile phone

Package Content: 

1 x mobile power supply 

1 x USB cable

1 x flannel bag