1. The material is made of high-quality metal material, seven heat, safe and durable, with walnut grain, smooth touch. Felt-based design to prevent stable top scratches.^2.Small size, easy to carry, suitable for most stainless steel cups, baby feeding bottles, ceramic cups, glasses, etc^3.Functional aluminum plate surface temperature up to 70-80? , keep coffee, tea or other hot drinks 55? , no need to worry about high temperature and high oxidation, safe to use. Do not touch the electric heating plate when the USB heater works to avoid burns.^4.USB interface power any device with 5VUSB output such as computer, desktop, laptop, tablet, power bank, etc^5.Uses suitable for home and office to keep warm and cold days.