This hand warmers comes in four colors, black, blue, gray and purple. The electric hand warmers comes with a high-definition LED display that shows the remaining charge and the temperature setting gear in real time. The temperature of the hand warmer is adjustable in four levels, one level shows L1 on the display with a temperature of 107-113°F, L2 is 114-120°F, L3 is 125-131°F, and L4 is 132-138°F, so you can adjust it to the right temperature as needed. The hand warmers rechargeable are magnetic design, when two reusable hand warmers are sucked together, they can generate heat on both sides, of course, you can use it alone or share it with others. The shape of the portable hand warmer contains an ergonomic design that perfectly fits the curve of your hand, so you won't feel any pressure when you are exercising outdoors or working in the office. Inside the package contains two portable pocket hand warmers, a manual, two silicone lanyards, and a Y-shaped Type-C charging cable, which can charge both usb hand warmers at the same time. When you charge the electric hand warmers, the green icon will blink, when the green icon stops blinking it means the charging is complete. The hunting heater is great to be used as a well-prepared gift that you can give to anyone you want. Believe me, they will love this hand heater.