Your scuba diving buddy will keep you in his eyesight with our new long lasting Super Bright Yoke Light. The Yoke Light integrates the marker light with the regulator yoke screw. Simply replace the existing yoke screw on your regulator with the Yoke Light. Twist lens to turn the light on/off. Made of durable plastic so the Yoke Light can be permanently installed. The battery lasts 12 hours of constant-on use. Models available to fit most regulators. Battery included.