Timekeeping: This DCF77 radio-controlled clock movement ensures exact time synchronization automatically. With a module size of 72 x 56 x 19 mm, it's perfect for wall clocks and DIY projects, ensuring your timepiece is always accurate without manual adjustments.The movement is only suitable for use in Europe. Optimal Shaft Dimensions: Featuring a shaft length of 24mm and a thread length of 17.4mm, this movement is ideal for dial thicknesses of approximately 8-14mm. It is recommended for dials with a diameter of about 200-300mm, making it versatile for various clock sizes. Simple 4-Step Installation: Easily install this clock movement in four straightforward steps: secure the mechanism, align the hands at '12', remove the positioning pin, and insert an AA battery. The unit then automatically searches for the radio signal to set the time. Efficient Power Use & Detailed Instructions: Operates on a single AA/LR6 alkaline battery (not included). Installation tips include keeping the hands parallel and avoiding excessive pressure to prevent bending. Detailed instructions a smooth setup process. Ideal for DIY Enthusiasts & Repairs: This complete clock movement kit is excellent for creating new clocks or replacing mechanisms in larger, thicker frames. Color: As Shown Material: plastic Package Contents: 1*movement 2 sets of hands Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.