Feature: 1, Made of high quality plastic material, safe and non-toxic, odorless and healthy. 2, It can be used to heat your milk, tea, coffee and so on. 3, Lightweight and portable, easy to carry, it will not occupy much space. 4, It can be used repeatedly and durable for long time use. 5, 3 gear of temperature adjustment. 6, Suitable for school, dormitory and office, easy to use the cup cushion. Specifications: Product name: USB heating coaster Material: Aluminum Alloy + Tempered Glass Size: 7*102mm Voltage: DC 5V/2A Power: 8-10W Switch: Touch switch Safety protection: automatic shutdown after 8 hours of work Operating instructions: 3 gear of heating. 1, Touch the switch for the first time to turn on the high gear, and the red indicator light will light up 2, Touch the switch again to turn on the middle gear, and the blue indicator light will light up 3. Touch the switch for the third time to turn on the low gear, and the green indicator light will light up