This Poseidon Jetstream Classic regulator is a must-have for any scuba or snorkeling enthusiast. Made in Sweden, it is a high-quality brand that is known for its reliability and exceptional performance. The Jetstream Classic model is no exception, providing ease of breathing and superior airflow. Whether you're a seasoned diver or just starting, this regulator is perfect for all your underwater adventures. It is designed to withstand even the harshest conditions, making it a great investment for anyone who takes their diving seriously. So why wait? Get your Poseidon Jetstream Classic regulator today and experience the thrill of diving like never before. A yolk to din adaptor is included, but the knob is scratched and can be easily replaced. This regulator was last dove on 10/23 and works perfectly. I recommend a routine service annually.