The BEACON LED Keychain puts your logo or message on display everywhere you go! Hook it onto keys, a backpack, a water bottle, or a purse to light the way in advertising for your brand. Engraving custom messages is available on both sides of the keychain. For all colors, the keychain is clear when the LED is turned off. Once turned on, the LED illuminates the keychain and engraved message in the color of the LED.