ITEM NAME:16 Music Box Electronic Production Toolkit, DIY Parts Description: Kit Name: 16 Music Box Working voltage: 4.5-5V PCB size: 48mm (length) * 41mm (width) Control method: manual coding + external coding The sixteen box can be used to control 16 interesting analog sounds under your control. It is an electronic toy or a doorbell or an alarm. Specification: Material: electronic material Size: 50*40*5mm Package Includes: 1set 16 Music Box Electronic Production Kit SKU: DMO0014018468007435.It is an electronic toy or a doorbell or an alarm. 1set 16 Music Box Electronic Production Kit. Material: electronic material. Size: 50 40 5mm.