I am looking to buy Letscom High-End Fitness Trackers.

Heart rate & sleep monitoring: tracks your real-time heart rate automatically and tracks your deep sleep, light sleep, and awake sleep so that you can have a comprehensive understanding of your sleep quality
All-day activity tracking & GPS connectivity: accurately record all-day activity, including steps, distance, hourly activity, active minutes, sleep status and calories burned
Multiple Sport modes: 14 different activity tracking modes including: walking, running, fitness, basketball, badminton, tennis, football, mountaineering, spinning, cycling, treadmill, hiking, yoga, Dancing all available to better Track your Workout Dancing all available to better track your workout.
Never miss call & message: your smart watch vibrates to notify you of incoming calls, calendar, SMS and SNS (Facebook, WhatsApp, LinkedIn, Instagram, and Twitter) notifications, making sure that you never miss the messages that matter.
Built-in USB plug & compatibility: easy to charge, no charging cable or dock needed; one single charge gives you up to 7 days of usage. IOS 9.0 or above/ Android 4.4 or above (for use with smartphone only, not suitable for PC, I pad or tablet).

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