ProSomnus SPAC Presentation Deck

I L 4₁ 4₁ 4 4 I Why is ProSomnus More Efficacious Than Legacy OAT? I I I ! Legacy OAT I I I Ir II Proprietary manufacturing technology enables ~7x more accurate prescription transfer || II 11 | I Precision Prescription Transfer Prescription Transfer Error (in millimeters)¹ I i Legacy OAT I I PROSOMNUS SLEEP TECHNOLOGIES PROSOMNUS SLEEP TECHNOLOGIES 1. 2. 3. 4. 5. 0.3 Efficacy Loss %4 3% 3.7 37% I T 1 I I I Patented titration mechanism mitigates risk of efficacy loss during sleep Jaw Movement During Sleep (mm) Efficacy Loss % with Jaw Movement due to Mechanism Design² 15 Titration Mechanism Innovation 10 5 0% 0% 0% 0% 4% 18% Hu, J. et al. Abstract presented at 2021 AADSM meeting Implication of Kato, 2000, applied to prescription transfer error and difference in lingual space Kato J, et al. 2000 PROSOMNUS SLEEP TECHNOLOGIES 36% Legacy OAT 55% I I I IL 4 I 4 1 4 T I Precision Anatomical Device Design Patented, anatomically precise, device design promotes better treatment mechanisms Tongue Space Impact by Device (in millimeters)³ Legacy Oat PROSOMNUS SLEEP TECHNOLOGIES Legacy OAT PROSOMNUS SLEEP TECHNOLOGIES PROSOMNUS SLEEP TECHNOLOGIES 1.5 Efficacy Loss %4 15% Why does this matter? ProSomnus precision OAT devices improve treatment outcomes by reducing the risk of efficacy loss; Studies suggest each 2 millimeters of error is associated with a 20% change in treatment efficacy5 Hu, J. et al. Abstract presented at 2020 AADSM meeting Kato J, Isono S, Tanaka A, Wantabe T, Araki D, Tanzawa H, Dose-dependent effects of mandibular advancement on pharyngeal mechanics and nocturnal oxygenation in patients with sleep-disordered breathing. 2000 April 17, follow-on analysis 6.7 67% 32 I I I | I STRICTLY CONFIDENTIAL

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