... a good partner; usually at home can also be used for reading, repair, prevent power failures, etc., a multi-purpose. Specification ... lights, long press compass for ON, Undo for OFFModel B: for currency detector .long presscompass for ON,Undo for OFFModelC:two white led ... white led lights, First press compass for ON, second press for twinkling, third press for OFFColor: Red,Black,Blue,Sopphire blue ...