Features: NOTICE: PLS NOTE That Battery IS Not Included ! Digital Tube Size: 0.8 inch digital Operating voltage: 5V DC (you can use the cell phone charger power supply), USB-powered computer Housing: Crystal shell. Shell need to assemble their own. Circuit: need their own welding please Function: accurate travel time, temperature alternately display, when power walking, alarm settings, the whole point of time, you can set the whole point of time during the day and at night is not reported Clock in the form of delivery of spare parts, need their own welding assembly! color : Blue include the Crystal shell.