Digital Wall Clock LED Time Calendar Temperature Desk Table Clocks Home Supplies 110‑240V Features: Clear and  Easy-to-read numbers, bright and high contrast display. 12/24 hour mode with calendar & temperature displayed along the bottom. Great finish - Front panel (glass), Frame (aluminum alloy). Can be placed on a table or hung the wall. Energy-saving--- less than 3W  power consumption. A button cell battery included for memory back-up. (Notice: This battery is just fot memory back-up. The clock cannot display anything during a situation like the blackout. ) We recommend that the red color one would be perfect for large public areas.The blue color would be perfect for enclosed areas. Specifications: Clock Size: 480mm(L) x 185mm(H) x 50 mm(W) or 18.9'' (L) X 7.3'' (H) X 2'' (W) Digit Size: 3-inch tall time digits,  0.5 inch tall calendar & temperature digits Power Consumption: ≤ 3 watts Weight: about 2KG Including: 1 X LED Clock 1 X 6V Power Adapter 1 X 1.5 Meters Power Cord