The Polar RS400 Heart Rate Monitor Wrist Watch is the perfect tool for fitness enthusiasts who want to keep track of their heart rate, speed, calories, and distance during gym and training sessions. This unisex watch is designed to provide accurate and reliable measurements, and it is compatible with English language. With its advanced features, the Polar RS400 is a must-have for anyone who wants to monitor their fitness progress. It is designed to be worn on the wrist, and it is suitable for both men and women. This heart rate monitor is perfect for gym and training activities, and it is ideal for those who want to keep track of their fitness goals.