“…It calibrates the number of beats per minute [17][18][19]23]. Pressure sensor [19,24,33] Heartbeat sensor [16,21,[25][26][27][28] Location sensor [8,12,17,23,28] Heart rate sensor [8, 12, 17-19, 23, 29-31, 36, 37] Blood pressure sensor [6,9,11,16,22,23,29,36] Drug-level detector sensor [36] ECG [7,9,11,18,32] GSR [11,32] PPG [32] Pulse sensor [7,33] SpO 2 sensor [1,9,17,33,38] Fall sensor [17,23,37] IR sensor [18] Pulse oximeter sensor [9,22] Stress sensor [22] Pulse oxime...…”