The moisture meter can quickly measure the moisture content of the grain. 1. Skin-friendly materials and simple design: This practical vest is made of lightweight shape-memory foam and polyester, ensuring comfortable and soft wear (please note that mobile power is not included). 2. Safe heating: 2 heating elements produce heat in key areas (back and neck) of the whole body. Customize with 3 heating settings (warmth, comfort, energy saving) at the touch of a button. 3. Fast Heating: In this cold and cold winter, warm vests allow you to enjoy outdoor activities such as riding a motorcycle, playing golf, camping, hunting, fishing, skiing, hiking, watching football. 4. How to clean: machine wash and hand wash. Don't twist it. Before cleaning, disconnect the power supply and make sure it is dry before heating. 5. Widely used: helps promote blood circulation. The perfect gift is the perfect choice for kids for outdoor activities (cycling, sports, camping, fishing, construction, etc. ) on cold and cold days. Specification: Voltage: 5V 2A (without battery, battery output requires 5V/2A) Gender: unisex Suitable season: autumn and winter Power Supply: USB power supply Powerbank with a capacity of 10 000 mAh is enough for 10 hours, different heating modes, different usage time (without batteries) How to use: 1. Connect the USB port to the power source 2. Connect the power bank, press and hold the power button for 3 seconds, start heating, then set the average temperature. 3. Press the button to change the temperature level. That is, low 30°C (violet index), medium 40°C (blue indicator) and high 50°C (red indicator). List of packages: 1 * heating vest (battery not included) 1 * USB charging cable (built-in clothes) 1 * User Manual Note: After use in excess, it will stop until the heat returns to the standard temperature. 4. Long press turns off the heating system.