Color/finish: grey Design details: With 6 heating levels from 37/98.6to 55/131, the portable bottle warmer allows parents to select the perfect temperature for their baby's bottle, promoting safe and comfortable feeding experiences. Compatible with most straight baby bottles and keep milk warm for up to 5 hours. Display temperature in real time, easy to operate. Compact and USB rechargeable, perfect for on the go! 6 Heating Levels: With 6 heating levels from 37/98.6to 55/131, the portable bottle warmer allows parents to select the perfect temperature for their baby's bottle, promoting safe and comfortable feeding experiences. Keep Milk Warm For Hours: Designed with premium thermal insulation, this on the go bottle warmer keeps the baby milk stay at the desired temperature for up to 5 hours, convenient and portable when it comes to travelling or running errands. Fit For Most Bottles: The baby milk warmer is compatible with most straight baby bottles, accommodating those with a diameter of up to 6.5cm/2.56in, ensuring a wide range of bottle types can be heated efficiently. USB Rechargeable Formula Warmer: Built in 6000mAh rechargeable batteries, this milk and formula warmer can run up to 90 minutes after fully charged. USB powered, easy to recharge by any device with a USB port. Travel Use: Display temperature in real time, easy to operate. Compact size. This breast milk warmer can be easily carried in your bag or suitcase. Measurements: 3.15in x 6.3in x 4.33in Imported