2-Pt. Acoustical Calibrator - Class 2 Lighting & Electrical Components Floralicious® features a potent blend

Floralicious® features a potent blend of nutrients for plant vigor

they may stay on the plants and be mistaken for live insects

chlorophyll is indispensable in photosynthesis

Coverage: 4x4 Feet

2-Pt. Acoustical Calibrator - Class 2 Lighting & Electrical Components Floralicious® features a potent blendFor calibration of all Sper Scientific digital sound meters or any sound level meter with 1 or microphone. Conforms to ANSI S1. 40 1984 and IEC942 1988 Class 2 standards for acoustical calibrators. Simply place the calibrator on to the digital sound meters microphone, turn on the calibrator, and adjust the decibel meters reading to either 94 or 114 dB. Operates at a frequency of 1KHz 4% and with an accuracy of 0. 5 dB. Built in battery check. Easily