Oaxis Smart Fitness Tracker Watch with sleep monitor / Step Tracker /Calorie Counter, OLED Touch Screen Bluetooth Smart Wristband / Bracelet / Sport Pedometer / Activity (Blue) Product dimension: 9.83 x 0.73 x 0.33 Product weight: 0.57 oz Transceiver: Bluetooth 4.0 (2.4Ghz RF) Vibration: Yes Display type: OLED 0.91 Resolution: 128 x 32 Control method: Touch control Battery type: Lithium-Polymer 50 mAh Charging time: 2 hour Requirements: iOS 7.0 and above, Android 4.3 and above Waterproof rating: IP67 (withstanding water immersion less than 1 min to 15 min) Belt materials: Bayer TPU 1 * Omniband+ Fitness band 1 * Charger cable 1 * Use Manual