Ensure the safety and efficiency of your UV cleaning process with our UV light testing cards. Each card is designed to detect both UVA and . To use, simply hold the card in of the UV light. The card will react by changing color, allowing you to confirm the presence and strength of the UV light. Features -Color:Multi -Material:PVC -Size:7.00X2.50X0.10cm/2.75X0.98X0.04in -Sturdy construction: crafted from pvc material, these uv light meters are built to withstand frequent use, ensuring performance -Versatile wavelength detection: capable of detecting both uva and uvc wavelengths, these uvc-uva indicator cards provide versatile testing options for different light sources -Simple to use: featuring a plugandplay design, these uv detection stickers are easy to use, requiring no additional setup or configuration for immediate testing -Clear and accurate: the cards display light wavelengths clearly, allowing for accurate and assessment of light in various settings -Ideal for professional use: suitable for a variety of professional light testing scenarios, these light effect tester cards are ideal for use in laboratories, factories, and other environments Package list: 20 x testing cards