Function: 1 55 degree intelligent constant temperature cup, small and portable, home office out, lightweight thin base, with constant temperature, easy to carry 2. Office health can reach people. You need a palm size. The small size does not occupy desktop space for organization. 3 Water placed cooling, and cold water has heated water at 55 degree centigrade 4. The glass is automatically placed after the cup pad, it is safer to turn off automatically 5. Tempered glass water - water panel, wear with sturdy tempered glass, Lifetime Use: temperature is 55 degrees, depending on the outside weather temperature and the cup with covered, the temperature may be between 3 and 8 degrees Celsius. Automatically reaches balance temperature and insulates at a constant temperature a> Specifications: Item Type: Cup Warmer Pad Material: ABS + Tempered Glass Size: Approx. 11.4 x 11.4cm / 4.5 x 4.5in Applicable Cups: Ceramic Cups, Stainless Steel Cups, Glass, Bottles, Milk Bottles, Easy Pull a> Package List: 1 x Cup Warmer Pad 1 x User Manual Note: Please allow 0-2cm error due to manual measurement. Thanks for your understanding.