1.5 inch 4 digit bus digital clock with temperature and date display, battery backup, low power, ... liable pcb design 1.5 inch 4 digit bus digital clock with temperature and date display Master Features: 1. Dimensions: 160 ... Voltage: DC15 ~ 30V; 3. Rated power: 4 W 4. Clock precision: the error ≤ 2 Secs 5. Temperature error: less ... 1.5 inch 4 digit bus digital clock with temperature and date display