Razer Nabu - Social Wearable Smartband - Black Discreet notifications- Text messages, emails, incoming calls, and even alerts from your favorite apps all straight to your Nabu via the Nabu's OLED screen. Fitness Tracking- Track your steps, calories burned, distance traveled, active minutes, and sleep with the Nabu's advanced algorithms and accelerometer. Band-to-Band Communication-Nabu users can exchange Facebook and Twitter contact information with just a handshake. Please refer user manual below