Use during gym workouts, outdoor running, and daily health oriented sports training to monitor performance and support training plans. Target users include fitness enthusiasts, athletes, those who need health management, and patients with cardiovascular diseases who require health monitoring. Key feature: accurate heart rate measurement with realtime data transmission to paired devices, helping you optimize health management and training decisions. Compatibility and build: works with multiple devices, lightweight and portable, built with durable materials for everyday use. Use scenarios: 1) In the gym to monitor heart rate zones and adjust training intensity for safe and effective workouts. 2) During outdoor running to track cardio performance and stay within target heart rate ranges. 3) For daily health monitoring or ongoing management for patients with cardiovascular conditions and others seeking continuous health insights.