Bring some fun to your maths lessons with the Legami Calcoolator - Maths Calculator. Battery and solar-powered, it makes light work of calculating and solving problems. And when you need a break from equations, turn over and play the maze game on the back! 1 x LR1130 battery included Automatic power-off: after 6 minutes of inactivity Dual power supply: solar and batteries Pocket-sized: 6 x 12.5 x 1.3 cm