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 until it is disarmed or it donates. The time until detonation depends on the Explosives skill of the person setting it off.

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