1、Constant temperature heating, 3 levels of temperature adjustable: 65℃, 55℃, and 45℃, maintaining more nutrition for baby. 2、USB power supply, easy to get powered through AC adapter, laptop, desktop, and power bank, convenient and flexible to use. 3、With adjustable fastener, size of the bottle warmer can be adjusted, suitable for milk bottles within 5.5-8cm (diameter). 4、Made from premium PU leather, no chemical smell, secure to use, a practical item for baby feeding. 5、Compact size and foldable design, easy for storage and carrying, a nice helper for daily feeding, night feeding, and travel. Features： Constant temperature heating, 3 levels of temperature adjustable: 65℃, 55℃, and 45℃, maintaining more nutrition for baby. USB power supply, easy to get powered through AC adapter, laptop, desktop, and power bank, convenient and flexible to use. With adjustable fastener, size of the bottle warmer can be adjusted, suitable for milk bottles within 5.5-8cm (diameter). Made from premium PU leather, no chemical smell, secure to use, a practical item for baby feeding. Compact size and foldable design, easy for storage and carrying, a nice helper for daily feeding, night feeding, and travel. Specifications： Color: Green, pink, blue, grey, brown (optional) Material: PU Power Input: 5V 2A Product Size: 29 * 13cm/ 11.4 * 5.1inch Product Weight: 100g/ 3.5oz Note： The milk bottles showed in the pictures are not included. Package List： 1 * Bottle Warmer 1 * Bottle Warmer