OWI Robotics X in 1 Renewable Energy Kit, 115 Pieces, Ages 8+ 0% of full scale ±1

0% of full scale ±1 digit 8Hz 20mF 10µF ±2

long lasting Aluminum Oxide that is suitable for sanding a wide range of surfaces including including wood

no soldering

Also you can change the pitch of the tune by using the Frequency Range switch

OWI Robotics X in 1 Renewable Energy Kit, 115 Pieces, Ages 8+ 0% of full scale ±1If you are familiar with OWI products, you are well aware of the Mini Solar Kit line. For almost 4 decades award winning kits have followed one another in succession. This year OWI supplemented a new renewable energy source, the Hand Generator. With in 1 Renewable Energy Kit (X meaning 10), scholarly children will construct ginormous kits with child friendly parts that function indoors with use of a Hand Generator, outdoors with the use of the XL