WD032: UV Ray Tester Keychain

Overexposure to UV rays can be dangerous. Now monitor the sun's UV intensity with this UV tester keychain! This convenient device is made of silicone and a photosensitive material that changes color on the UV radiation intensity from clear to dark. You'll know exactly when you've had enough by matching the 4 colors which indicate the intensity. No batteries are required. It suits for people at all ages. Hand out this great gift with your logo to clients and protect them from the UV ray!