Christmas Tree LED Flash Kit 3D DIY Electronic Learning Kit

Ctr-30 flash Christmas tree set consists of three contour boards, allows 36 LED flashes alternately, showing the tree in the space of a three-dimensional profile (the night environment looks better). 

Features: 
Kit model: ctr-30 (three-color light) / ctr-30c (Color ful Light) 
Operating voltage: DC4.5-5V 
Power supply: 3 AA batteries or USB charger (Adapter does not include) 
Dimensions: 60x136x60 mm (L x W x H)