DUEL SDS FIELD SPRAY 10 OZ. 12 PK. Avoid detection with the NEW Sensory Disruption System (SDS) from Duel. SDS uses odor molecules to intersect and disrupt wild game’s sense of smell (their olfactory system). The proprietary blend of ingredients within each bottle of SDS also exists within your query’s natural habitat which allows Duel’s SDS to inhibit their senses without causing alarm.