3 Pack USB Smart Beverage Warmer-USB

For the best warming performance, we recommend using a mug with thin-wall, flat-bottom mug! Have your wonderful warm drink all day without waiting! USB connection Perfect 131℉/ 55℃ Maintain:USB connection becomes more convenient for anywhere use.Our coffee warmer can slow down the cooling speed of hot drink, and hot your drink reaching around 131℉/ 55℃.Keeps this nice stable temperature whole day,which is neither too hot nor too cold, you can have your wonderful coffee all the time without waiting.For better warm result,we recommend you to place the thin wall mug for atleast 30minutes! ☕Auto on and off and easy to use:Use the microgravity technology,our smart coffee warmer can shut on and off automatically.Just put on a flat place,remove the blue protective film,then plug the USB adapter into outlet,the warmer will auto activate when you place your cup on it and shuts off when the cup is removed.No need to turn it on/off manually. ☕Mutiple-type flat bottom cup suitable:Our Coffee Mug