Specifications Display: LED Material: waterproof fabric Battery type: Lithium battery 18650 Battery capacity: 8000mAh Insulation time: 3.5~4.5 hours Heating time: 20 minutes Battery charging time: 6 hours Output voltage/current: 5V/2A

Safe and Reliable Material: A good quality bottle warmer bag is designed to heat bottles safely and efficiently, without the risk of overheating or scalding. It is made from high-quality materials that are durable and long-lasting, ensuring that you can use it for multiple outings and trips. Fits most bottles: The bottle warmer bag is designed to accommodate most baby bottle sizes and shapes, including standard, wide-neck, and angled bottles.This makes it a versatile solution for parents who use different types of bottles for their baby. Long Lasting keep Heating: The bottle warmer bag is thermal insulated, keeping the heated bottle warm for several hours. This feature is especially useful when traveling or running errands, as it ensures that the bottle is ready to use whenever your baby needs it. Wireless and rechargeable: The bottle warmer bag comes with large capacity built-in rechargeable battery, which make it possible for wireless use. You don't need to plug it to any power source.Just put the bottle in it, the bag will warm up the bottle in minutes. Fast Heating: Adopting imported temperature sensing chip, the milk bottle warmer takes about 20 minutes to quickly heat milk by 5V-2A voltage.