The item is a 12V vehicle-mounted mini linear bottle warmer heater which is suitable for bottles with diameter between 65mm~75mm. It is easy to operate and can be used to warm coffee, water, milk, juice, etc. With portable design and easy to use, it is really a wonderful gadget for travel use. Features - Color: Black - Size: 13.1 x 8.5 x 8.5 cm - Material: Neoprene - Voltage: DC 12V - Current: 1. 2.1 A - Power: 22.8-25W - Temperature: 104 fahrenheit scale/ 40 degree centigrade - 12V car mini linear temperature programmer. Easy to operate. - Made of carbon fiber heating material, warms quickly and evenly. - Good expansibility, it can stretch to fit baby feed with diameter between 65mm~75mm. - It is easy to operate and can be used to warm coffee, water, milk, juice, etc. - With a hook for easy carrying. It is really a wonderful gadget for travel use. - Warm Tip: Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you! How to use Put the heating case with liquid into the mini linear temperature programmer, then plug the provided car adapter into the 12V car-mounted lighter directly. WARM TIPS - Don't pour liquid into the inside of the mini linear temperature programmer to avoid short circuit , of fire. - Only using 12V car voltage, otherwise it will burnning. - Don't use when cover when bottle is empty or liquid lower than 10% capacity. Package list: 1 x Baby Bottle Warmer Heater