China-only Honor Watch 6 Pro adds a four-level cardiac arrest system that can escalate from background checks to strong vibration, then call emergency contacts, display AED guidance and alert nearby people.
1.5 to 3 seconds is the initial assessment window; if suspected cardiac arrest persists beyond three seconds, the watch steps up its response instead of issuing a standard low-heart-rate warning.
CNY 1,699 pricing also brings Blood Pressure 2.0, which uses optical sensors and AI-based interpretation rather than a cuff, plus a 1.5-inch dual-layer OLED display rated at up to 4,500 nits global brightness.
18 days is the top battery claim under light use, falling to about four days with full health monitoring; the cardiac arrest and blood-pressure features require enrollment in Honor research programs.
No international launch has been announced, leaving the most advanced cardiovascular functions limited to China for now.