Coffee Mug Mat Warmer, Usb Constant Temperature Hot Coasters, Green

3 gear of temperature adjustment.Made of high quality material, safe and non-toxic, odorless and healthy.It can be used to heat your milk, tea, coffee and so on.Lightweight and portable, easy to carry, it will not occupy much space. It can be used repeatedly and durable for long time use.Suitable for school, dormitory and office, easy to use the cup cushion.Color:GreenMaterial:Plastic + MetalPackage Contents:1 x Coaster warmerOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.