The Polar RCX3 Run Heart Rate Running Watch is a versatile and reliable fitness tracker designed for unisex adults who enjoy running and jogging. With its GPS sensor, this watch accurately measures your heart rate during indoor and outdoor workouts. The watch is powered by batteries and made of durable plastic, making it suitable for everyday wear on your wrist. Its English language display provides clear and concise feedback on your heart rate performance, helping you to track your progress and improve your fitness levels. New battery added to watch, great condition. Other devices and memory stick untested - priced accordingly.