Specifications: - Device type: Wristband activity tracker- Battery life: 15 day(s)- Battery technology: Lithium- Battery capacity: 70 mAh. - Weight: 28 g- Width: 20 mm- Depth: 242 mm. - Mobile operati more→ng systems supported: Android 4.3, Android 4.4, Android 5.0, Android 5.1, iOS 7.0, iOS 7.1, iOS 7.2, iOS 8.0, iOS 8.1- Connectivity technology: Wireless