This is a kit, so you will need to assemble it yourself. It runs without batteries, powered by a weight. The weight descends 130cm and runs for approximately 24 hours. The weight is 600g (not included in the kit, you will need to prepare it yourself). Accuracy was tested by building four machines, all of which ran within 2 minutes of accuracy per day. Size: Height 32.5cm (excluding the anchor and pendulum) Width 20cm Depth 14.5cm Size including the anchor and pendulum is 137cm. The wood is 3mm thick lauan plywood. Assembly instructions are only available in video format, not on paper. Kit contents: 6 wooden boards 10 brass rods 14 washers (9 for standard use, 5 for adjustment) String Wax Slippery tape Bolts Nuts Silicone rubber You will need to prepare: Cutter (blade tip 30 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 Weight of about 600g (a simple solution is to fill a 600ml PET bottle with water, which weighs about 620g) Ruler Toothpick - Please read the notes about the kit - Incorrect assembly may cause the clock to fall or break. Use caution as you will be using a cutter and some sharp parts to avoid injury. Be careful of swallowing small parts (especially for children and pets). Initial defects (cracks, chips, etc. in parts) will be replaced free of charge. Parts damaged by the customer are not covered by warranty (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. Please feel free to contact us if you have any questions or concerns. Here is a video on how to build the mechanical pendulum clock standard: https://youtu.be/mVFGsQCu294?si=BQ3Fnx0DlkXvpiN1