Or you can set at some points of one day to ring automatically happy birthday song. When you are outside, you can also leave a message on the board to your family. Power supply: USB charging port or AAA battery (Batteries not included).Clock with 4 USB ports for power charging or data transmission.Leave a message with fluorescence pen(easy to wipe with pen brush).Calendar, time and temperature displaying by switching mode.Message board with blue fluorescence light.
