You can assemble and operate a mechanical pendulum clock yourself. This is a kit, so you will need to assemble it yourself. It runs on weights, not batteries! It runs for approximately 24 hours with a 130cm descent of the weight. The weight is 350-400g. (You will need to prepare this yourself as it is not included in the kit.) Size: Height 22.5cm (excluding anchor and pendulum) Width 27.5cm Depth 11.5cm The size including the anchor and pendulum is 117cm. The wood is 3mm thick lauan plywood. Assembly instructions are only available in video format, not on paper. Kit contents: 4 wooden boards 8 brass rods 21 washers String Wax Slippery tape Bolts Nuts Silicone rubber You will need to prepare: Cutter (30° blade recommended) or design knife Wood glue Super glue Pencil with a hardness of HB or higher (6B recommended) Sandpaper (approx. 600 grit) Scissors Hook to hang the clock on the wall 350-400g weight Ruler Toothpick - Please read the notes about the kit - Incorrect assembly may cause the clock to fall or break. Be careful of injuries as you will be using a cutter and some sharp parts. Be careful of accidental ingestion of small parts (especially by children and pets). Initial defects (cracks, chips, etc. in parts) will be replaced free of charge. We cannot guarantee parts damaged by the customer. (Parts can be ordered for a fee) The wooden parts may warp. The wooden parts are laser-cut, so the cut surfaces will be scorched. If you are concerned, rub them with a melamine sponge or fine-grit sandpaper. The wooden boards have variations in thickness, so some adjustments may be necessary during assembly (adding adjustment washers or sanding). Returns are accepted within 14 days of product arrival. If you have any questions or concerns, please feel free to contact us.