feature: 1. 5 seconds rapid heating, continuous heating for 4 hours, heating temperature up to 58 degrees Celsius 2. The 360-degree heat of the whole machine is warm from fingertips to palms 3. Equipped with a non-slip tote bag to prevent falling, light and portable 4. Automatic mode, automatically stop heating after 2 minutes, then pick up and reheat 5. Built-in NTC temperature control module, which can keep the temperature not hot in a relatively closed environment Specification: Size: 98*41mm Battery capacity: 4000mAh Material: ABS+PU+Aluminum alloy Output (heating power): 9W Maximum heating temperature: 58 Continuous fever time: 3-4 hours Input interface: Micro-USB Notice: 1. Due to different monitors and lighting effects, the actual color may be slightly different from the picture color. 2. Please allow 1-3cm difference due to manual measurement. include: 1x Hand Warmer 1 x Manual 1 x data cable