DIY assembled Wireless Bluetooth Speaker toy model kits set,educational science physical DIY physical experiments toy.Principle : Bluetooth Speaker Data transfer via Bluetooth technology, powered by 4 AA batteries(Battery is not included).Adopting eco-friendly wood material, no pollution, safe to use.Great scientific experiments lab teaching aids school supplies, designed DIY scientific toy gifts for kids.High quality electronic components and accessories make it has stable performance, more durable.Note: Need to be assembled by yoursel.Colour:Photo ColorMaterial:wood+plastic+metal+electronic accessoriesFinished size: 124 x 85 x 100mmPackage Contents:1 set of Wireless Bluetooth Speaker Module Kit (This is just a DIY kit, not a finished product; Battery is not included)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.