1. Time, date, week (1-7, Sunday is represented by 7), and temperature are displayed simultaneously 2. Fatigue driving reminder function.(a reminder of driving duration be given every 1 hour. When the reminder is given, there be two be at the same time and the driving time be displayed on the screen) (1 hour of driving remind once, 2 hours of driving remind continuously twice, after 3 of driving, each continuous reminder be 3 times, and each 10 minutes remind the driving time, reminding the driver to pay attention to rest) 3. Equipped with time memory function 4. 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 time 5. Equipped with luminous function Dimensions: 94x84x27mm Power supply method: solar energy or Micro-USB power supply (powered by internal high-temperature lithium battery at night or on cloudy days) Shell material: high temperature ABS material, working temperature:-20-+80 Temperature measurement range:-40-+99 Special note:Long driving, such as transportation vehicles, commercial vehicles, taxis, etc., requires charging with a charging cable when solar power is insufficient. Colour:Black Material:Plastic Package Contents: 1 * Solar Car Digital Clocks Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.