Color classification: black, silver, red. Use a 5V adapter (USB charging head) for power supply, and we have a USB cable attached. It only needs to be calibrated once, and it will not be wrong to power off afterwards. Have a great holiday season!
This item is in the category "Home & Garden\Home Décor\Clocks\Alarm Clocks & Clock Radios". The seller is "micelh_31" and is located in this country: IL. This item can be shipped to North, South, or Latin America, all countries in Europe, Japan, Australia.