This module emits a green L.E.D light when connected into a circuit with the correct polarity (+/-) . 
 
Requires a minimum of 3Volts (2 batteries) to operate.
 
Fitted with a current limiting resistor for protection.
 
ideal for use with Solar Cells or the Electricity hand crank.
 
Features securely fixed components mounted onto a sealed ABS enclosure with non slip rubber feet. 
 
Also available as a front of class magnetic demonstrator