The Cardio Sport HeartSafe-T water-resistant exercise gym and swimming heart monitor in black is designed for indoor and outdoor activities. Made of plastic, this unisex heart rate monitor by Cardiosport provides measurements for heart rate, speed, time, calories, distance, and watts. With a battery life of more than 7 days, it is lightweight at 6 oz and features water resistance for added durability. Perfect for gym and training sessions, this device is a reliable tool for tracking and improving cardiovascular fitness.