Specification: Color: Red, Green, Blue, Grey. Bluetooth Version: BT 4.0 or above. Compatible OS: Android 4.4 or above, iOS 8.5 or above. Operating Mode: Touch Screen. APP Name: Wearfit 1.0. Waterproof: IP67 waterproof. (Do not operate underwater) Heart Rate Monitor: Support. Blood Pressure Monitor: Support. Blood Oxygen Monitor: Support. Sleep Monitor: Support. Multi-sport Modes: Support. Pedometer: Support. Call or Message Reminder: Support. Alert Type: Vibration. Stopwatch: Support. Sensor: G-sensor, Heart Rate Sensor. Screen: Size:  1.3inch. Type: TFT. Resolution: 240*240 pixels. Battery: Battery Capacity: 180mAh. Standby Time: About 10 days. Using time: About 7 days. Charging Time: About 2 hours. Charging Type: Magnetic charging. Band: Material: Silicone, TPU. Length: about 250 mm. Width: about 22 mm. Product size: about 44.6*11.6*250 mm. Product weight: about 36.5g. Package: 1*Smart Bracelet. 1*Charging Cable. 1*User Manual. Tips: 1. Display and light of shoot will affect the color of the products, pictures for reference only, subject to our available products. 2. Please download the app before usage in order to compatible perfectly with your phone.