Bluelab Original Truncheon Nutrient Meter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>The Bluelab Truncheon Nutrient Meter has proven itself as the world's favorite nutrient meter</li><li>Fully waterproof design</li><li>No external switches or adjustable buttons</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ccxLqf-1L.jpg" noproxy>