1.5 inch 4 digit bus digital clock with temperature and date display, battery backup, low power, stable and liable ... design 1.5 inch 4 digit bus digital clock with temperature and date display Master Features: 1. Dimensions: 160 × 50mm; 2 ... . Clock precision: the error ≤ 2 Secs 5. Temperature error: less than 1 degrees6. working environment: Temperature -10 ~ 70 , humidity from 0 to ...