The Oxyflow Lung Trainer is a versatile breathing trainer suitable for both indoor and outdoor use. This portable device, with an electric corded power source, is made of durable plastic and comes in a sleek black color. Designed for adults, this branded trainer from the United States is ideal for beginners looking to improve their balance and cycling performance. Its foldable feature makes it convenient to store and transport, making it an essential accessory for cyclists looking to enhance their lung capacity and overall fitness.