Intelligent temperature control, built-in thermostatic heating element, heating more evenly and quickly Multifunctional, can be used to warm hands, neck, abdomen, can also be used as a power bank 5000mAh high-capacity battery, fully charged for your device anytime, anywhere 3-speed temperature adjustment, low-grade 40 , mid-range 50 , high-grade 60 Neck warmer function, fixed at 48 , neck warmer can be individually controlled (double-click the switch, the power on display temperature "88", off display "00") 2.0A fast charging, with USB output port + micro input port Small size, easy to carry Specifications: Material: ABS Rated voltage: 3A Rated power: 13.5W Operating voltage: DC 5V/3A Power supply interface: USB Battery capacity: 5000mAh Charging time: 4 hours Endurance time: 2-5 hours Size: 15.5*9*3.5cm Compatible with: Universal Package included: 1 x Hand Warmer 1 x Charging Cable 1 x English and Chinese User Manual