Welcome to our store! 1. USB Power Supply: Use a power bank or computer charging head for power. The compact mini size is perfect for on-the-go use. 2. Dual Use: This rapid cooling and heating base can quickly cool or warm your beverages. Enjoy a refreshing cold drink in the summer or a comforting warm drink in the winter. 3. One-Key Operation: Simplify the process with one-button control for easy switching. 4. Efficient: The coaster is highly efficient for cooling. The chassis can be used all day without pressure. Large exhaust holes are designed for rapid heat dissipation and extended lifespan. 5. 11 to 68 ℃: This pad can reach a maximum temperature of 68 ℃ and cool down to 11 ℃. It's a great gift for family, girlfriends, and children. Item Type: Cooling Heating Coaster Material: ABS Gross Weight: 743g/26.2oz Power Supply Mode: USB Power Supply Cooling Heating Plate Size: 100mm/3.9in Product Size: 86x166mm/3.4x6.5in Input Voltage: 5V Power: 10W Temperature Range: 11℃ to 68 ℃ Includes: 1 x Cooling Heating Coaster 1 x USB Cable 1 x Manual