What is a Kegelmaster Advanced, Bundle, Kit, Upgrade, Second Device, etc.?
There is no such thing as a Kegelmaster Advanced, Bundle, Kit or anything like that. There is only the Kegelmaster. No other product sold with the Kegelmaster as a kit or bundle is sanctioned by the inventor nor the manufacturer. There is no such thing as a Kegelmaster Advanced. If you are purchasing anything other than an Original Kegelmaster or the Advanced Spring set, you are purchasing items not intended to be included with the Original Kegelmaster. The Second Device is a mini vibrator and is not necessary to the use of the Kegelmaster. Please be cautious of anyone attempting to sell you additional items not intended to be used with the Kegelmaster.