The Jive is the first whistling yo-yo made since the 1970's, and the first ever high performance whistler. With a bearing axle and response system, this one plays nicely while whistling. Similar to the old Duncan Sonic Satellites, a metal whistle is built into one side, with holes drilled to it from the rims. Spinning forces air thru the holes creating the whistle.
Pictured here is the concave version. Different design on the yo-yo than the standard, but with the same logo text.