Product Function: Chime Music Box plays the melody on the hour, with 4 kinds of melody. Design: Two black wires on the music box connect to speaker, two blue wires connect to movement. SET: Chime Time Setting Button After press one time"SET"button,the chime time will one hour, after press one time"SET",the quarter hour will not work correctly during the first hour after time is set.The correct chiming will start at the full hour. Practical Tools : This Music Box can be used when DIY Clock, it's a clock accessory, practical to design and make your own clock. Note: Two 1.5V Carbon zinc batteries only,not included. Do not use high current batteries,rechargeable batteries,they will damage the movement. Specification: Name: Clock Chime Box with Horn Material: Plastic Color: Black Size: 58x58x16cm/22.83x22.83x6.30inch Battery: 2x 1.5V Carbon Zinc Batteries only (Not Included) The fonts on the product, the numbers are different in different batches, it does not affect the use Package Contents: 1 Piece Clock Chime Box with Horn Only the above package content, other products are not included. Note: Light 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.