A portable device is disclosed, the device having a body and an attachment, the body comprising an attachment mechanism having a slot and an actuator, the attachment comprising a protrusion engaging the slot, the actuator having a first position and a second position , As the protrusion engages the slot, the actuator moves from the first position toward the second position. In the first position the actuator at least partially makes the slot invisible. The actuator includes a surface that interacts with the protrusion when the protrusion engages the slot. The surface at least partially forms a slot at or near the second position. When the protrusion is in a predetermined position within the slot, the actuator returns toward the first position. The actuator is biased towards the first position.
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