Main material: iron shell + aluminum sheet Type: Light Wood Grain, Dark Wood Grain, Matte Black Power: 5W Voltage: 5V Electric current: 1000mA Max working temperature: 80°C Wood grain width: Approx. 16mm / 0.62inch Metal plate diameter: Approx. 75mm / 2.95inch Whole diameter: Approx. 103mm / 4.05inch Package included: 1 x Cup Warmer with USB cable (cups are not included) 1. Material: This cup warmer mat is made of high-quality metal materials, evenly heated, safe and durable, with a walnut wood grain pattern and smooth finish. The felt base design helps prevent scratches on tabletops. 2. Compact size: Small and portable, suitable for most stainless steel mugs, baby bottles, ceramic mugs, and glass mugs. 3. Function: The surface temperature of the aluminum sheet can reach 70–80°C, helping maintain beverages such as coffee, tea, or other hot drinks at approximately 55°C. Designed for safe operation without excessive heat or oxidation. Avoid touching the heating surface during use to prevent burns. 4. Power supply via USB port: Compatible with any device featuring a 5V USB output, such as computers, desktops, laptops, tablets, or mobile power banks. 5. Usage: Ideal for home or office use, helps keep drinks warm on cold days.