The first single lever paddle released for use in Amateur Radio back in 1960. Unlike iambic paddles that can be squeezed to send individual letters, a single lever paddle is a single arm that pivots between the dit and dah contacts for clean sounding code sent with the electronic keyer in your transceiver. The Vibrokeyer has long been the go-to standard for DXpeditioners for the fastest, snappiest CW transmission. The knob and thumb piece arrangement reminiscent of the "bug" keys is the most ergonomically correct for CW operation.