Graphic Display Sound Meter grow-light-ballasts Packing: 25 units per case

Packing: 25 units per case

It features multiple modes of action from metabolites produced during fermentation

Do not apply granular on top of the soil

Includes citric acid to aid in absorption

Graphic Display Sound Meter grow-light-ballasts Packing: 25 units per caseFeatures a large bar graph display, A & C decibel frequency weighting scales, min max, peak, fast or slow response, AC or DC output, auto power off, low battery indicator. Covers 30 to 130 dB in the A & C scales with a resolution of 0. 1 dB and an accuracy of 1. 4 dB (ref 94 dB@1KHz). Comes ready to use with a windscreen, 9V battery, instructions, and a foam lined hard shell carrying case. N. I. S. T. Traceable Certificate of Calibration available, or