VBR-Aqua PAR Meter for Aquarium.R,G,B PAR Seperately.with a Telescopic Rod Description Features: PAR Meter for Aquarium specially. Waterproof Sensor with a telescopic rod.Test the PAR for kinds of lights accurately. Can search “compare” in Q&A to see the comparison between VBR-AQUA and other brand.Show the PAR of the blue, green, and red in the light seperately. Know the PAR of Blue that is very important for your coral growth, health, and coloration.Record 400 points of PAR, convenient to record the PAR of each position in the tank. DLI for 28 days.3 AAA batteries can ensure the PAR meter last for 100 hours. Also can use the adapter for continuous testing.For stable and accurate PAR, please don't let water flow when test. Product Details: Package Dimensions : 13.39 x 8.78 x 2.28 inches; 1.76 PoundsItem model number : VBR-AQUABatteries : 3 AAA batteries required. (included)Date First Available : June 8, 2023Manufacturer : De-PowerCountry of Origin : ChinaBest Sellers Rank: #36,185 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #7 in Lab Photometers & Light Meters#7 in Lab Photometers & Light MetersCustomer Reviews: 4.2 4.2 out of 5 stars 62 ratings Shipping Free fast shipping Return Policy All items qualify for returns within 30 days of receipt.