The Steer wearable helps ensure drivers stay alert at the wheel. Steer is a wearable that doesn’t noticeably do much until you start getting sleepy. But the device is packed with 16 sensors that constantly measure the wearer’s heart rate and skin conductance. It compares these stats to your normal rates, and if it senses your heart rate decreasing it sends you a warning with a strong vibration and flash of yellow light. Think of it like a quick slap reminding you to wake up. If your heart rate keeps dropping despite the warning, the device will think you are about to fall asleep and will try and jolt you awake with an electric shock. It works in a similar way to the “shock clock” designed to get you up in the morning.