Lifesense Heart Rate monitor + Smart Activity tracker + Call alert for Android and iPhone Smart Watch Strap  (Black)

Lifesense Watch continuously measuring the heart rate by photoelectric sensor technology, combined with sophisticated and accurate algorithm, it provides accurate continuous heart rate data, which ensures you keep the suitable heart rate range in all day and during exercise. Lifesense Watch auto recognize your sleep status, includes sleep degree, awake time duration, fall asleep time, awake time. After sleep data sync, user could check on-line chart showing sleep trend, and set silent vibration alarm, which wakes you up silently and start a new day. Once connected with Bluetooth, the device could easy access to call (caller name, caller ID), SMS, and other social sites' notifications. Touching and sliding the screen to check the text on the screen. Never miss any important calls and messages.