Product details: Name: Portable hot and cold adjustable hair dryer with USB port, small wireless heater office dormitory Note: This product does not come with a battery, you need to purchase the same type of battery and install it on the product before you can use it Style (battery not included): Formakita Black Goku heater (no USB), Formakita Black Goku heater (with dual USB) Battery Adapter: Formakita Battery (This product does not include batteries, please purchase this type of battery yourself) Color: as shown in the picture feature: Hot and cold forair Effective heating: This space heater uses low power, designed to save energy, making it ideal for smaller spaces such as workshops or factories. It has advanced temperature detection and thermostat control for more precise heating. Small and Portable: The rotary head provides versatility, allowing you to keep the heater in any room without taking up too much space. It is compact and easy to carry and move. Products include: 1* car hair dryer Note: Due to manual measurement, slight dimensional errors (1~2cm/0.39~0.78 inches) are allowed, see Actual Receive; slight color errors are allowed under different monitors.