Mechanical structure, without battery power supply. The mechanical scale works by spring-induced gravity, purely physical movement. without the use of batteries. The 16cm large dial design is different from the ordinary electronic scale display mode, and the reading is clear.The instructions are accurate. Give you a different weighing experience! Product Name: Mechanical Scale Product color: dark gray Product material: steel plate Product size: 30.6X31.6X5.3cm/12X12.4X2.1in Product thickness: 5.3cm/2.1in Maximum weighing: 180kg Dial diameter: 16cm/6.3in Display mode: large scale dial Packing content: mechanical scale×1 ▶Because transportation reasons, Need to turn down the 0 knob, It can be used accurately when it is adjusted to 0. Because it is the reason the new machine. There needs to be a process of running-in and stretching between the gear and the spring. So the pointer will not always be at 0 at the beginning, But you only need to adjust it manually, When you use it for a period of time, you don’t need the master tune. ▶If you have any questions about our Mechanical Scale, please feel free to contact us, we will answer you in the first time. Provide you with the best service. ▶Delivery cycle: The general logistics time is 10-20 days. If it causes you inconvenience, we will be sorry, Please understand. ▶If you need more style Mechanical Scale, you can visit our shop.