Simply swab a surface, release the reagent, and if protein residue is present the reagent will turn purple. The more contamination present, the quicker and darker the color change to purple. Quickly validates the hygiene of a surface, allowing immediate corrective action to be taken if necessary. Pre-moistened swab provides reliable collection, recovery, and detection to ensure consistent results. Low carbon footprint devices are 100% recyclable. 18 month shelf life at room or refrigerated temperatures. Detects 80 µg protein after 1 minute. Detects 50 µg protein after 5 minutes. Detects 20 µg protein after 10 minutes. Disregard any color change after 10 minutes.