1. Time, date, week (1-7, Sunday is represented by 7), and temperature are displayed simultaneously2. Fatigue driving reminder function.(a reminder of driving duration will be given every 1 hour. When the reminder is given, there will be two be at the same time and the driving time will be displayed on the screen) (1 hour of driving will remind once, 2 hours of driving will remind continuously twice, after 3 of driving, each continuous reminder will be 3 times, and each 10 minutes will remind the driving time, reminding the driver to pay attention to rest)3. Equipped with time memory function4. Automatic power on/off: start with the vehicle, display normal driving status with vibration during driving, and automatically shut down when parked and stationary for a period of time5. Equipped with luminous functionDimensions: 94x84x27mmPower supply method: solar energy or Micro-USB power supply (powered by internal high-temperature resistant lithium battery at night or on cloudy days)Shell material: high temperature resistant ABS material, working temperature:-20-+80℃Temperature measurement range:-40-+99℃Special note:Long tme driving, such as transportation vehicles, commercial vehicles, taxis, etc., requires charging with a charging cable when solar power is insufficient.Colour:BlackMaterial:PlasticPackage Contents:1 * Solar Car Digital Clocks