How solid they are depends on the environment they're in. They primarily vary by...

		_81wg on Nov 27, 2015 \| parent \| context \| favorite \| on: Listening to satellites for $30 How solid they are depends on the environment they're in. They primarily vary by temperature so if you're using them in an air conditioned room they're unlikely to have issues but if you leave them outside you'll notice the PPM value varying throughout the day.