Great for checking levels of 3.7V Lithium cells. This is essentially a visual/graphical voltmeter, and allows you to keep tabs on energy usage, and to keep an accurate schedule for when to replace your lithium batteries.
A beautiful desk toy for your favorite person’s office!!
Learn how solar cells transform light into electrical energy with this great kit!
Working model representing the sun, earth, and moon and their relationships.
The large realistic model has removable organs that can be studied and set back into the correct position.
View the glory of space with this hi-tech telescope set!
This magic bird defies gravity before your very eyes!