Product Details: Brand: ROCKBROS Material: Main Unit: PC/ABS (Housing) + TPU (Button) Arm Strap: Lycra + Hook-and-Loop Fastener Dimensions: Main Unit: approx. 46 × 35 × 13 mm Arm Strap: approx. 22 × 352 mm Charging Cable: approx. 75 cm Weight: 12 g (Sensor) + 13 g (Charging Cable) + 7 g (Arm Strap) Connectivity: Bluetooth, ANT+ Waterproof Rating: IP67 Battery: 90 mAh Lithium Battery Charging Method: Magnetic Charging Battery Life: Up to approx. 15 hours Product Description: Dual-Mode Connection: Thanks to reliable Bluetooth and ANT+ transmission, the heart rate sensor connects effortlessly with smartphones, bike computers, smartwatches, and compatible smart trainers. Real-time data can be easily synced with apps like Strava – ideal for versatile training and precise performance analysis. Dynamic LED Heart Rate Display: Five colored LED lights indicate your current heart rate zone during training. If the heart rate exceeds 200 BPM (default value), the device vibrates three times – providing direct, intuitive real-time feedback. Lightweight and Secure Fit: Weighing only about 12 g and 13 mm thick, the sensor offers high wearing comfort. The elastic, non-slip Lycra arm strap ensures a secure hold, even during intense movements – perfect for running, cycling, or indoor training. Magnetic Charging: Equipped with a long-lasting 90 mAh lithium battery, the device provides up to 15 hours of operation. Magnetic charging allows for quick and convenient recharging without hassle. IP67 Sweat and Splash Protection: With an IP67 protection rating, the heart rate monitor is well-protected against sweat, rain, and temporary submersion – perfect for training in any weather and intense workouts.