Samsung - Gear Fit Fitness Watch + Heart Rate - Black
Samsung Gear Fit Fitness Watch + Heart Rate: Monitor your exercise and sleep habits with this Samsung watch that features accelerometer, gyro and heart rate sensors to provide helpful fitness data. A Bluetooth 4.0 + LE interface allows pairing with select devices, so you can receive SNS, call, e-mail and app notifications.
Is it compatible with the Samsung Note 4?
Not according to this site. http://www.samsung.com/us/support/gear/gear-fit-support/