The objective of the research was to assess the feasibility of utilizing copper oxide particles as a reinforcing and conductive additive in a thermoplastic elastomer. This study focused on examining the influence of particle size on primary strength characteristics and aging resistance, as well as conducting an impedance measurement to gauge the impact of copper oxide particles on electrical conductivity. The findings of the study revealed that incorporating copper oxide particles at the nanoscale leads to enhanced mechanical and conductive properties in comparison to both the base material and the composite with microparticles. However, it was observed that the addition of microparticles in a 5% by weight ratio failed to provide significant improvements in strength and electrical conductivity. Additionally, the study found that the incorporation of copper oxide nanoparticles improves the aging resistance of the composite.