Frag Mine (Fallout 3)

The Frag Mine looks like a tan shaped disk with a black gear and red button on top. The tan paint is most likely used to camouflage the mine out in the desert covered Capitol Wasteland. The Frag Mine will begin beeping when a target comes within a short distance to it and will detonate after beeping twice.

Frag Mines can be disarmed with a high enough Explosives skill or simply avoided with the Perk: "Light Step".