Feature: Lightweight and small, easy to place and store, easy to carry. The USB vacuum flask is easy to use, just connect it to a USB-supported device. Safe and reliable, equipped with high-quality heating elements and USB power supply. Retro dashboard design, simple operation. Suitable for home and office use. Keep the glass of water, tea, coffee, milk or other drinks warm. Appointment heating, timing start, humanized, intelligent, more convenient and practical. Specification: Product size: 180 x 90 x 20 mm/7.08 x 3.54 x 0.78'' Product color: dark green, mint green, pink Product weight: 186g Rated voltage: DC5V Input current: 2.1A (min) Rated power: 10W (min) Power supply mode: USB plug-in Function: 5-mode temperature adjustment, drink water reminder Package Included: 1 x Mug Warmer It is very suitable for winter use. Keep the cup warm in cold weather, non-slip, heat-insulating, placemat. Lightweight and small, easy to place and store, easy to carry. The USB vacuum flask is easy to