The range and singing style of Peter Frampton have remained admirably intact over his nearly four decade-long career. While the focus on "Hummingbird in a Box" is directed towards bold instrumentals, Frampton does make more than just the occasional appearance as lead vocalist on this effort. It would hardly be an authentic Peter Frampton album without such an addition, and during such previously mentioned selections as "Shadow of My Mind" and the title track, this same quality serves as the final touch atop a formidable performance.