Aspect of the inventions may include a universal handpiece that can be coupled to pre-existing legacy RF signal generator systems to provide certain precision controlled radiofrequency therapies and treatments for skin. Further, another embodiment of the present invention may include an interchangeable electrode (tip section) with an array of distally insulated microneedles, conductive pads or smooth surface configurations which couple to the handpiece for allowing for heating of dermis without damage to the superficial epidermis. This allows the handpiece to be used for various different treatment types by changing the tip or electrode section to meet the requirements of a desired therapy, rather than requiring another dedicated handpiece.