This Vintage Nike "The Monitor" Heart Rate System Model 1000 is a must-have for fitness enthusiasts. It comes in a sleek gray color and is made of durable plastic material. It is suitable for both indoor and outdoor use and runs on batteries. The heart rate monitor features a chest strap and is water-resistant, making it perfect for gym and training activities. It provides measurement of heart rate and is specifically designed for the torso area. This unisex adult heart rate monitor is a great addition to any fitness routine. This is not tested and being sold as is. Looks as everything that went with this item is in the bag. Please ask questions before purchasing.