The item is a portable bottle warmer which is suitable for bottles. It is easy to operate and can be used to warm coffee, water, milk etc. With the constant temperature, it can keep the milk warm all the time. With portable design and easy to use, it is really a wonderful gadget for travel use. Features - Color: Random color. - Material:Fiber. - Size:14.50X7.00X7.00cm/5.70X2.75X2.75in. - Input power: 5V 2A. - Temperature control: three gears. - Power supply mode: USB power supply. - It is made of high-quality ABS material plus great processes, durable and sturdy. - Universal baby milk bottle cover, suitable for most baby feeding bottles. You can use it with confidence. - It can keep the warm temperature and prevent it from becoming cold. - The baby milk warmer can be used for portable power bank, charging plug, car USB interface, portable and safe. - It's made with excellent workmanship, with creative design, convenient to use.