Choice works through two tiny valve implants, one each in a woman's two fallopian tubes. These implants are placed in a short, outpatient procedure, without surgery. In the fallopian tubes the closed Choice valves now separate male sperm from the female egg, preventing the conception of children. When a woman decides she is ready to have a child, all that is needed is a wireless signal, and the Choice system opens the valves. The woman is now ready to conceive.

Outside of the short moments when the valves are opened or closed, the Choice system contains no active electronics. The Choice system also contains no batteries. Choice works as a reversible sterilisation system. It simply blocks the tubes, unless a woman decides otherwise. It contains no hormones, or other active chemical components.

For a small investment in money and time early on, a woman gains a lifelong ability for family planning.