DK67 1.53 inch IP67 BT 5.0 Fitness Sport Smart Watch, Support Bluetooth Call Sleep Blood Oxygen Heart Rate Blood Pressure Health Monitor 1. Chip: 7012A6 2. APP: RDFit 3. Compatible with smartphone systems: Android 4.4 or IOS 9.0 or above systems 4. Memory: RAM: 192KB ROM: 256KB Flash: 128M 5. Screen Size: 1.53 inch TFT 6. Pixels: 360 x 360 7. Bluetooth: 5.0 8. Supports: NFCG-SensorHeart RateGPS 9. Battery: 300mAh Lithium Polymer 10. Waterproof Rating: IP67 11. Charging Time: About 3 hours 12. Battery Life: Around 5-7 days of use, standby for 15 days 13. Strap Size: Total length 210MM, adjustable length 140-210MM 14. Strap: Silicone strap 15. Supported Functions: HD Bluetooth calls, screen off pointer, custom images, APP background image download, QR code (download, connect two in one), find phone, calendar, sports track, restart, message push, remote photography, Alipay, sleep monitoring, altitude, temperature monitoring, weather, blood pressure, voice assistant, my QR code, key definition settings, blood oxygen, breathing, dials, steps, timer, menu style, factory reset, settings (Smart Island, drainage, power saving mode, screen off time, raise wrist to light up the screen, NFC, brightness, key definition, vibration intensity, do not disturb mode, password settings, language, time and date settings, connect APP, factory reset, restart, shutdown, about), phone (contacts, call records, dial pad, call settings, emergency call), calculator, heart rate, language selection, about watch information, alarm clock, sports mode, Bluetooth music, Bluetooth call, stopwatch, screen off time, vibration intensity, time and date settings, password lock. 16. Languages: First Edition Languages: English, Russian, Spanish, German, Italian, French, Portuguese, Dutch, Japanese, Hebrew, Czech, Arabic, Korean, Polish, Turkish Second Edition Languages: Chinese, English, Vietnamese, Greek, Portuguese, Persian, Turkish, Indonesian, Hebrew, Thai, Malay 17. Size: 47.6 x 47.6 x 12.9mm 18. Weight: 65g Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.