Adafruit Light Up Key Switch Keychain - Blue LED

This charming Key Switch Keychain is an ideal accessory to showcase your etched glow-through keycaps. Featuring a satisfying clicky tactile key switch, it includes a blue LED powered by a CR1220 battery. Simply press the button to illuminate your keycap with a brilliant light.Enjoy the sensation of a custom DIY keyboard build in a mini-sized, portable form. Perfect for fidgety hands, it comes with a convenient cord for attachment to bags or purses. Note that keycaps are sold separately, allowing you to select your preferred design to snap on.