The Cove machine is a high frequency electrosurgical unit.
Adoption of a high-frequency bandwidth of 5MHz has the following advantages:
> Generating sine waves as output waveform to minimize the formation of scars due to arcs during operation.
> Minimizing thermal damage to surrounding tissues through focus- ability, a property of high frequency, producing an effect of concentrating energy onto one spot.

> Utilizing soft plasma technology
> Useful coagulation for wide bleeding range
> 5 steps Output power control

> Equipotential: An electronic current generated from the difference between ones concentrated on the return pad and ground may cause burns. Therefore, the technique of giving the return pad a proper ground connection was adopted to remove differences of the electronic current.

> Carrier wave: prevents carbonation resulting from arcs, attachment of tissues onto the surface of the electrode and the occurrence of secondary bleeding.

Unlike earlier surgical devices, COVE has the advantage of a coagulation effect as follows:
> There is no carbonation of tissues when they are coagulated.
> The electrode does not generate heat so tissues do not stick to it even though a special electrode is not used.
> Transmission of a minimum level of thermal energy at the time of tissue coagulation minimizes damage to tissues.