Highlight: • Washable • Convenience To Carry • Safety voltage 5v • Safe and easy to use • Good heat preservation effect Features: Portable- Easy to fold and carry Heat preservation- keep the bottle warm in everywhere Multi functional- Heating and warming Product Description: This usb bottle warmer is design to heat and keep the baby bottle warm, it can stretch to fit most baby baby feeding bottle, easy and safe to use. 42°C Constant Temperature constant temperature heating & efficient maintenance of nutritional milk. It is also convenient to carry out.