Type: Two-piece whistle - not telescoping, but detaches in the center. Prototype model.
Volume: Quiet with a small amount of backpressure.
Status: Available for $85 - the Scratch and Dent discount is applied because of a tiny wobble in the joint that I have not been able to remove. I'm still working on the best method of expanding the tube for the joint.
Additional details: This whistle will fit in a travel case. The length of the longer section is just under 6.5 inches. The mouthpiece is white plastic with a green plastic plug.