plastic Imported Smart Heart Rate Zones: LED indicator displays real-time heart rate zones – Warm-up, Fat Burn, Aerobic, Anaerobic, and Max Effort – helping you optimize your workout intensity. New 4-Channel Optical Heart Rate Sensor: With advanced signal processing, this sensor reduces motion artifacts and accurately tracks your heart rate during intense exercise. Dual Connectivity (ANT+ & Bluetooth):Connect seamlessly to smartphones, fitness equipment, smartwatches, and bike computers for multi-device heart rate monitoring. Personalized Fitness Management:Provides performance analysis, training plans, and metrics to help runners and athletes improve their physical fitness and track progress. Comfort & Durability:Washable elastic strap (12.2g lightweight) ensures comfort during wear and is designed for all-weather conditions with a 30m waterproof rating. EZON C022Pro Heart Rate Monitor Armband with ANT+ & BLE Bluetooth,3ATM Waterproof - Adjustable Design for Running Cycling Gym, Compatible with Peloton/Wahoo/Polar/Strava