Use Blink to add a unique and decorative touch to any wall. This wall clock mechanism operates on a quartz clock movement that ensures precise and maintenance-free time measurements. Blink’s metal time indicators and the number 12 mount individually to the wall with easy to paste adhesive and the clock mechanism mounts with a screw or nail. The size is customizable depending on your preference, however if you aren’t feeling adventurous, Blink does include a preset wall template. All you need is 1 AA battery (not included) and you are set. Measures 39.5 x 1.38 x 39.5" (100 x 4 x 100 cm). This wall clock is made with an eco-friendlier finish. It produces 85% less water and solid waste than traditional electroplating finishes. Blink’s metal time indicators and the number 12 mount individually to the wall with easy to install strong 3M adhesive and included mounting template. Clock mechanism mounts with a screw or nail. Mounting Hardware Included: Blink includes a clock mechanism that mounts to the wall with a screw or nail, and metal indicators that mount to the wall easily thanks to their 3M adhesive. Warning: Surface damage may occur if adhesive mounting is removed.