An input device includes a plurality of sensor electrodes and a conductive guide. The sensor electrodes may be configured to sense an electric field within a sensing region. A first portion of the conductive guide may be configured to contact an input object outside the sensing region. A second portion of the conductive guide may be configured to interact with the electric field. The input device may include a processing system couple to the plurality of sensor electrodes to evaluate the electric field from the plurality of sensor electrodes and determine whether an input object is in contact with the first portion of the conductive guide.