Sound Level Pen discounted regulating CO2 and water through

regulating CO2 and water through osmoregulation of the plant' stomata

make efficient use of water resources and reduce your pressure on water bills

We only use USP-grade (United States Pharmacopoeia) Propylene Glycol

bushy root mass with lush

critical environments

Sound Level Pen discounted regulating CO2 and water throughIts small size makes the Sound Level Pen super convenient for testing in a wide variety of sound meter applications. Auto ranging with simple one button operation. Press once to begin reading sound levels. Press the button a second time and the display holds the maximum reading, updating as new maximums are reached. Hold the button for 2 seconds to turn the unit off. Measures the 30 to 130 dB range in the "A" scale, with an accuracy of 1. 5 dB. The