Feature: 1. Clear Display: The digital wall clock has a large number of hours, minutes and seconds, a week temperature display, and a digital tube display for the time 2. Accurate Timing: The digital wall clock has an accuracy of less than or equal to plus or minus 0.3 seconds/day, with a black border, which is elegant and beautiful 3. Plug in Use: The digital wall clock has a built in CR2032 210mAh button battery, which is convenient and practical for plug in use 4. 2 Placement Method: The digital wall clock has a hanging hole and a table hanging design, which is safe and stable, not easy to fall, and can also be used on a desk 5. Scope of Application: Study, restaurant, office, conference room, computer room, laboratory, school, hotel front desk Specification: Item Type: Digital Wall Clock Material: Aluminum Alloy, Plastic Product Size: Approx. 36.6 x 15.5 x 3cm / 14.4 x 6.1 x 1.2in Wall Clock Battery Parameters: CR2032 Button Battery, 210mAh (built in) Doorbell Battery Parameters: 23A 12V Alkaline Battery (Battery Not Included) Scope of Application: Living Room, Bedroom, Study, Office, Kitchen, School, Public Place Weight: Approx. 971g/34.3oz. Package List: 1 x Digital Wall Clock 1 x Doorbell (Battery Not Included)1 x USB Cable1 x Plug2 x Screw1 x Accessories1 x User Manual Note: Wall Clock Shipped with Built in Battery, Doorbell Shipped Without Battery