Provided herein are uses of the Harlequin bug pheromone, murgantiol, alone or in a synergistic combination with at least one other stink bug attractant, such as methyl -decatrienoate or methyl -decadienoate, or both, for attracting stink bugs such as the brown marmorated stink bug in outdoor settings. These two functions are assumed by two separate spring means according to the present invention. A small amount of external circuitry is added to allow the ring to oscillate and detect read instability errors. The user interface includes a first actuator having an anchor positioning tool enabling selective deployment of the anchor in the first tissue, and a second actuator enabling selective opening and closing of the jaws of the grasper. In use, the outer balloon member is biased by contraction onto the inner balloon member thereby keeping the holes therein normally sealed closed and minimizing dead space in the device.