1. Time display, 12/24 hour system conversion. 2. Alarm function. 3. Snooze function, snooze time: 5 minutes. 4. Capable of switching temperature display unit C/F(degree). 5. Temp metering duration: 3 seconds. 6. Car battery voltmeter(DC 12V-24V, it can be manufactured particularly if not meet your requirements). 7. Key-press function.