This is a great holiday gadget . . . as fun to build as it is to display! It's also an excellent confidence-builder for learning and/or reinforcing the essential hobby skill of soldering. Complete, unassembled electronic kit includes pre-cut 3D Christmas tree circuit board, plenty of red, green and yellow LEDs to allow you to customize your tree, and instructions. Assembled tree may be displayed free-standing, or hung from the tree as an ornament. Very low power consumption; Max: 8 mA. Requires one 9V battery (not included) to operate. Also operates on 12V DC. Dimensions: 3.1 inches wide x 3.5 inches deep x 4.0 inches tall.