The present invention refers to a gene transfer system for stably introducing nucleic acid into the DNA of a cell by using a member of the human mariner transposases. The external adjustment device further includes a motor mounted inside the first handle and a first button located in the proximity to one of the first handle or the second handle, the first button configured to be operated by the thumb of a hand that grips the one of the first handle or second handle. A lever connects the tightening handle and first handle. The upconversions may be via oversampling or via analog mixing. The certified advertisement is then propagated over the communication network.