Robotime - Leonardo da Vinci's Helicopter Mechanical 3D Puzzle spo-disabled It is compatible with a

It is compatible with a full range of the most popular battery types

Wrist storage deck

Use with the NC-20 nose cone

Charging Capability: 5s-8s NiCd/NiMH battery

2x Metal Shield Bearings 7x14x3

Robotime - Leonardo da Vinci's Helicopter Mechanical 3D Puzzle spo-disabled It is compatible with aBe inspired to invent and create with the ROKR Leonardo da Vinci's Helicopter, a DIY puzzle kit based on the genius's 15th century ideas of a flying machine. The brilliant engineer and inventor Leonardo Da Vinci's sketched flying machines long before the technology or the materials to make this possible were invented. Today, ROKR brings this vision to life with the Leonardo da Vinci's Helicopter, a mechanical 3D puzzle that features double helix