Minifigure flashlight with keychain.
From the manufacturer:
Lego Key Light is the perfect flashlight. At 2.75", this pocket sized key chain is the brightest flashlight around. 2 super bright LED's emanate light through the feet of the LEGO Mini-figurine, with pose able arms and legs, you can shine the light anywhere you like. Press the logo on the chest for a burst of light. Key Light includes 2 CR2025 batteries.