The wrist-facing sensors include PPG (photo-plethysmography) and ECG (electro-cardiogram). Like most modern wrist wearables, that ECG sensor uses LED lights to monitor your heart rate and pulse ...

On Friday, April 11, Guthrie presented its K9 Security Team: “Echo Cardiogram Guthrie” also known as “Echo”, and his handler, K9 Security Officer Jennifer Vaughn. Echo is a one-year-old ...