The Phantom PHOTOBIO Advanced Quantum PAR Meter provides accurate and cost-effective measurements for any horticultural light source. It measures PAR flux in the range of 400 to 700 nm, which is critical for photosynthesis rate and crop yield. Includes compact main unit, remote sensor, connecting cables, AAA batteries and protective case. Stores up to 99 readings for easy adjustments during growth. Ideal for greenhouses and commercial cultivation with modern LED and HPS lamps.