The author studies high energy resonances for the operators $-Delta_{partialOmega,delta}:=-Delta delta_{partialOmega}otimes Vquad textrm{and}quad -Delta_{partialOmega,delta'}:=-Delta delta_{partialOmega}'otimes Vpartial_nu$ where $Omegasubset{mathbb{R}}^{d}$ is strictly convex with smooth boundary, $V:L^{2}(partialOmega)to L^{2}(partialOmega)$ may depend on frequency, and $delta_{partialOmega}$ is the surface measure on $partialOmega$.