Ready assembled mechanism for easy installation applicable up to 120 cm diameter. it can be applied up to a diameter of 70 to 120 cm. numbers are 7 cm long hand : 13 cm minute hand : 18 cm movement 10 cm (hanging on nails) material mirrored plexi (non-sticker - non-deformed durable material) numbers stick (quality adhesive) clock mechanism : silent sweep movement special design laser cut hour and minute hands are metal. it works with 1 aa battery. ready for assembly. you can apply directly to the wall by removing the protector on the back of the pieces. there is also a protective gelatin in front of the plexiglasses. you can use a damp cloth during cleaning. the price is for 1 piece. Create a party-ready atmosphere with this colorful LED lighting. Easy to install and perfect for events or home decoration.