Enhance your gaming experience with -in-1 detection lens keychain, designed for detecting marked cards and mahjong tiles. The device features multiple light options, including white, blue, green, and purple, to uncover invisible ink. To operate, choose the light that matches the ink and illuminate the cards or tiles, revealing any concealed marks and ensuring . Features -Color:Assorted Color -Material:Acrylic, artificial -Size:19.70X1.80X0.60cm/7.74X0.71X0.24in -Size:13.80X3.30X0.50cm/5.42X1.30X0.20in -Versatile light detection: lens keychain capable of detecting white, blue, green, and purple lights, meeting diverse requirements -Precision engineering: detection lens provides high accuracy, ensuring dependable results for all light inspection tasks -Easy to carry: compact keychain design allows for effortless portability, enabling users to perform light detection on the go -Multiple uses: for use in optical shops, labs, and personal scenarios, making it a versatile tool for various applications -Robust construction: built to withstand regular use, this lens is durable and resistant to damage, ensuring longevity Package list: 1 x lens 1 x pouch