feature: 【Food Grade Material】Using food grade high borosilicate glass body, which is healthy, safe and high temperature resistant. 316 food grade stainless steel heating plate, safer and healthier. 【300ml Capacity】The portable water warmer has a capacity of 300ml and can soak milk 3-4 times. Wireless and fast heating, the baby water fountain is a good helper for preparing milk powder outdoors. [With temperature display] The water temperature has an LED screen to display the temperature, which is practical and considerate; supports temperature adjustment from 37 degrees Celsius to 55 degrees Celsius, suitable for different infant formulas [Built-in large-capacity battery] Built-in 5200mAh large-capacity battery, which can maintain a constant temperature for up to 8 hours; Equipped with a Type-C charging port and USB charging cable, it can be conveniently used as a mobile power supply, USB power adapter, laptop computer, and car charger. Water heater charging. [Other features] Bouncing cup lid design, one-handed operation, easy to use; Silicone anti-slip pad on the bottom, more stable placement; Small and lightweight, more convenient to carry for outdoor travel. Specification: Color: white/pink/blue (optional) Material: borosilicate glass+stainless steel+ABS Capacity: 300ml Temperature range: 37 degrees Celsius to 55 degrees Celsius Battery capacity: 5200mAh Charging: 5V USB Product size: 21 * 8.6 cm/8.3 * 3.4 inches Product weight: 580g/20.5oz packing list: 1* water heater 1*USB cable