The NEW SEALED Sportline Solo 900 Heart Rate Watch in Black is a versatile fitness tracker suitable for indoor and outdoor activities such as running, yoga, and gym training. With a reliable battery life of more than 7 days, this wristband monitor provides accurate heart rate measurements in decimal format. Made of durable plastic material, this Sportline Solo 900 model is designed in English language to cater to a wide range of users looking to track their fitness progress effectively.