USB Portable Constant Temperature Heating Electric Light Warm Hand Treasure ✿Feature: ✿Constantly warm your hands, side is heated. ✿Small and compact, easy to carry and go out, drop-proof design, safer ✿lanyard design, non-slip drop ✿Charging is convenient and fast. You can charge this product with a power bank or laptop ✿When charging, turn off the power and prohibit use to avoid burns ✿Use the matching charging cable to charge this product with more of mind, with current control ✿5 seconds quick heating,Turn on and heat up when it's hot, three gear temperature regulation, 4-hour ✿Product size: 33 x 33 x 110.5mm ✿Battery capacity:2000mAh ✿Charging time: 2 ~ 3 hours ✿Battery type:Lithium battery ✿Input / output 5V / 1A ✿Battery interface :Type-C ✿[product name]: portable hand warming treasure ✿[product material]: aluminum alloy + plastic ✿Package Content: ✿1pc x Hand warmer ✿Note: ✿allow a little error on the size due to manual measurement. ✿The color might exist slightly difference due to different displays. ✿ ✿ Constantly warm your hands, side is heated. ✿ Small and compact, easy to carry and go out, drop-proof design, safer ✿ lanyard design, non-slip drop ✿ Charging is convenient and fast. You can charge this product with a power bank or laptop ✿ When charging, turn off the power and prohibit use to avoid burns