Before jumping into the use of all kinds of expensive, supposedly "next big thing" bells and whistles devices, such as RF devices, one might be wise to investigate the use of HA fillers for a nonsurgical neck rejuvenation. Botox can be helpful for diminishing the vertical neck cords related to muscular movement of the neck muscle, the platysma. An appropriate robust HA filler injected properly can help to diminish the static (at-rest) component to these cords. HA skin boosters can help to hydrate and improve the quality of the neck skin between the treated cords, and a low viscosity, cohesive HA filler can elevate and smooth static "horizontal necklace lines," if this is of concern. And, what's really nice is that in experienced hands all of the above if needed can be performed in a twenty minute session in . Even the jawline jowls can be straightened and defined, if necessary, using an appropriate HA filler. So, before embarking expensive treatments with all the machines that are hawked on Dr. YouTube (whose hard science to support their use unfortunately lags woefully behind the heavy marketing to promote them), it would be prudent to consult with an experienced, board certified cosmetic dermatologist. Hope this helps and best of luck.