15-Second SpO2 tester: Preset programs test any combination of saturation, heart rate, perfusion, transmission, artifact noise, and r-curve in 15 seconds or less. Key Features: Small, portable and lightweight. Large, easy to read LCD display. Rechargeable battery lasts 10 hours minimum. Signal strength indicator. SpO2 Saturation: 70, 75, 80, 85, 90, 95, 97, 98, 99, and 100 %. Heart rate: 30, 60, 80, 100, 120, 150 and 245 BPM. Perfusion: 0.2 %, 2 % and 10 %. Transmission: dark/thick, normal and light/thin. Artifacts: respiration and ambient light. R-curves: Nonin, Masimo, Nellcor, Nihon Kohden, Mindray, GE/Ohmeda, Philips, BCI. Manual simulation and custom 1, 2 and 3 simulations sets.