2021 Good Quality Usb Hand Warmer - HT522 – 4 in 1 rechargeable hand warmer,with bluetooth speaker&power bank&light lamp – AOOLIF

• Reusable, less waste versus disposable warmers.
• Exchangeable cartoon doll make it a great gift for friends.
• Perfect for staying warm inside offices or extended outdoor activities.
• Quickly shows the selected heat setting & battery charge remaining.
• Plenty of heat to keep your hands warm in cold weather.
• Mini speaker help you to play music when you get warm.

How to use with the buttons:
Changing color button: Hold the button to turn ON or OFF, when open the light color will changing automatically, After turn on, click the button will fix the color
Heating button: Hold the button to turn ON or OFF the heating function, when turn on click the button could change the heating level.
Speaker button: Hold the button to turn ON or OFF the speaker and then connect your mobile phone or other digital product
How to use the hand warmer heating function:
There are 3 heating level, 40°C 48°C 55°C and there is 3 blue light,
1blue light on, the surface heating temperature about 40°C,
2blue lights on, the surface heating temperature about 48*C,
3blue lights on, the surface heating temperature about 55°C.
1.Hold the heating button for 5 seconds, when 1 blue light on the hand warmer start heating
2.each time you click the heating button, the blue light will be lighting 1 more light until 3 blue lights all turn on
3.The light and heating level could be circle by click the heating button
4.When heating, hold the heating button for 5 seconds it could turn off the heating function