Venn MoonClock Moon Phase Clock Our Moon Tracker Clock (MoonClock) Displays the current Moon phase. Your MoonClock is laser engraved into 6mm thick wood and measures 18cm by 18cm. Wood is a natural material and can contain obvious grains and flaws that make each clock unique. The single hand rotates clockwise and is driven by an accurate quartz movement, just like a regular clock, but it goes once round once every 29.5 days to match the phases of the moon. It takes our Moon about 29.5 days to complete one cycle of phases (from new Moon to new Moon). https://en.wikipedia.org/wiki/Lunar_phase The golden "scorched" effect is the residual sap left over from the laser process, because of this some pieces will may look different from the items pictured. If you prefer, you can remove the excess sap using a damp cloth. The sustainable wood is untreated and you can use standard wood stains or inks, to give it your own personal touch. Suitable for indoor use only and requires 1 x AA battery (not included) Poplar wood is light in weight and colour. Poplar wood is sustainable and has a Programme for the Endorsement of Forest Certification [PEFC]. Thanks for looking. Cat & Pete xx