Safe USB powered warmth: This foot warmer uses a direct USB power supply with a 5V/2A input, delivering heat without an open flame for safe, hazard warmth you can rely on. Comfort and easy upkeep: Made from ultrasoft flannel, it offers lasting comfort. The plush outer fabric is washable, and the inner heating pad is removable for convenient cleaning and hygiene. Reliable warmth in cold weather: Heats up to 45 ± 5 degrees, helping keep your feet toasty and comfortable even in chilly conditions. Clear attributes for practical use: Function foot warming; Compatibility USB power supply (5V/2A); Material ultrasoft flannel; Performance heating up to 45 ± 5 degrees; Maintenance washable fabric with removable inner heating pad. Use scenarios: Ideal for relaxing on the sofa or in bed during cold days; suitable for work at a desk in an office or study area; helpful for warming up after outdoor activities on a cold morning.