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| Brand Name | SIKAI | Model Number | B57 |
| Place of Origin | China | Display Type | IPS |
| Screen Resolution | 320x240 | Screen | < 2", 1.3 inch IPS color |
| Display Color | Color | Feature | Touch Screen, Bluetooth, Heart Rate, blood pressure, ip67 waterproof, call reminder |
| Operation System | ANDROID, IOS | Camera | No Camera |
| Design | SLIDER | Movement Type | Electronic |
| Band Material | Silicone | Case Material | ALLOY |
| Function | Alarm Clock, Call Reminder, Fitness Tracker, Heart Rate Tracker, MONTH, Sleep Tracker, Week | System | android4.4 and above, iOS 8.0 or above, support for Bluetooth 4.0 |
| Bluetooth version | BLE 4.0 | Main control chip | NRF52832 |
| Ram | 16M | Waterproof | IP67 |
| Touch | Capacitive touch Key | Sensor | Three Axis sensor/Green light active heart rate sensor |
| Packing list | one smart bands, one user manual, usb port charger |
Room 517, 4th Building, Xixi Feng Shang, 499 Wen San West Rd., West Lake District
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