Features: Also can be converted into doorbell, alarm clock, alarm, and so on. An electronic product that allows you to assemble yourself. It can open your mind and imagination, and can also train children and students. Control Mode: manual coding + external coding. It can be assembled with toys and can produce as many as 16 different sounds, making very interesting toys. The 16-tone box can emit 16 interesting analog sound effects at will under your control. It is not only an electronic toy, but also a doorbell or alarm. Specifications: Name: 16 Music Box Kit Model: BOX-16 Operating voltage :4.5-5V PCB Size: 48mm (Length) x 42mm (Width) Control modes: manual coding + external coding Material: Plastic Color: As pictures shown Quantity: 1 Set Package Includes: 1 Set x 16 Music Box Electronic Module DIY Kits note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!