Use Blink to add a unique, decorative touch to your living room, kitchen, den, bedroom, entryway or office. The clock mechanism operates on a quartz clock movement that ensures precise and maintenance-free time measurements. Blink"™s metal time indictors 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 is required (not included) and you are set.Modern And Versatile: Blink is a unique, minimalist take on a clock thanks to its simple metal indicators and DIY approach.All Umbra Clocks Are Tested In-House: Inside our factories is a wall where every single one of our clocks is tested to make sure it ticks just right. 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 backing; the clock is battery operated (batteries not included), 1 aa battery required.