• USB powered 
• LED indicator for the water temperature 
• PTC ceramic heating material
• Can fit 100% standard feeding bottle

How to use:

1. For precise temperature detecting, the bottle must be close to the sensor module.
2. After the velcro pad combination of the portable warm milk, put the bottle steadily on it, then roll up the bottle body and use the both sides velcro to tighten, finally unlock the USB cable and plug in the 5V/2A indoor power supply or mobile power bank and can see the LED indicator status.
3. Please note that to use the velcro as close as possible to the bottle body and the current must choose 2A or above, in order to quickly reach the constant temperature.
4. No idle loading, that is, when the bottle is empty, do not plug into the power supply.