HTC TM21 Smart Watch Black Large 1.04

HTC TM21 Smart Watch 1.04 Inch

The HTC TM21 is a large smart watch in black designed for smartphone users who want continuous health monitoring. It tracks heart rate, blood oxygen, body temperature and sleep duration while also providing women's health insights. Vibration alerts keep you informed of calls, alarms and reminders without checking your phone. The device pairs with the AIZO RING app on Windows and mobile platforms with no subscription fees.

All-day tracking and IP68 water resistance

Continuous sensor sampling runs throughout the day and night, capturing heart-rate trends, SpO2 levels and temperature shifts rather than single snapshots. The IP68 rating means the watch withstands dust ingress and immersion in water, so tracking continues during swimming, showering or heavy rain. Bluetooth connectivity maintains a steady link to the companion app for real-time data sync and vibration notifications during extended wear.

Simple magnetic charging and touch control

A dedicated magnetic charging cable snaps onto the back of the case, removing the need to align fiddly pins. The touch surface responds to double-tap and swipe gestures for music control, photo shutter, e-book paging and slide navigation without reaching for the phone. Buyers must measure finger circumference against the size chart before ordering, as an incorrect fit causes loose sensor contact and unreliable readings.