TomTop has the M2 0.42″ OLED Touch Screen Smart Wristband in black, yellow, blue, or green for $11.99 with Free Shipping for a limited time. Note that this item ships from China and it may take a couple of weeks to arrive.

The Fitness Smart Wristband features a real-time heart rate sensor, sleep monitoring, pedometer, phone, and app notifications, and is compatible with Android 5.0 & iOS 8.0 or above.