Material:Plastic + Electronic components Size: 8*4.5*10cm Power supply :USB Weight:About 110g Color:Pink, Blue, Purple Temperature adjustment: low temperature 50°c, high temperature 60°c Battery capacity: 500mah Packaging:1 pcs Hand Warmer Product features: 1. The new hand warmer not only keeps your hands warm, but also acts as a USB charging bank to power your phone or other devices. Ideal for winter travel or travel. 2. Using advanced heating technology, after the hand warmer is fully charged, you only need to press the switch to quickly heat up, providing instant warmth for your hands. 3. Charging through the USB interface, the charging time is short, and a full charge can maintain a long time of work, which will greatly increase its portability and practicality. 4. Built-in overheat protection function to prevent safety hazards when the temperature is too high. And has a perfect anti-hot design, more comfortable to use. 5. The shape design is simple and fashionable, with a variety of colors to choose from, easy to carry, whether it is for personal use or as a gift to give people is a good choice. Notes: 1.Please allow 1-2cm differences due to manual measurement, thanks. 2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is the same.