The FitBit Surge Series Fitness Super Watch Wristband Activity Tracker. Small size. Black version. Requires an iOS or Android smart device and also syncs with Windows Vista and Later/OS 10.6 and later. Surge syncs automatically and wirelessly to tablets, computers and 150 leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology.

Features:
- Make the most of training with built-in GPS, Automatic and continuous wrist-based heart rate monitoring, Track daily stats like steps, distance, calories burned and sleep quality.
- Stay connected on the move with advanced smartwatch features like call and text notifications and music control.
- Touch screen monochrome LCD with backlight for low-light visibility. Durable and flexible elastomer wristband. Surgical grade stainless-steel buckle.
- Sweat, rain and splash proof. GPS. Digital compass.
- Optical heart rate monitor. Three-axis accelerometer. Three-axis gyroscope.