Recommendation ITU-T P.1110 specifies performance requirements and test methods for wideband (50 to 7 000 Hz) hands‑free communication in motor vehicles. This Recommendation covers: – built-in hands-free systems, – aftermarket hands-free car kits, – single microphones, – mobile phones connected via short-range wireless to hands-free systems, to be used in motor vehicles for communication. This Recommendation addresses the test of complete systems as well as the subsystems hands-free microphone and telephones with short-range wireless transmission links used to interconnect the hands-free system to mobile networks. For testing purposes, test setups and recommended environmental conditions are described. The methods, the analysis and the performance parameters specified in this Recommendation are based on test signals and test procedures, as defined in Recommendations ITU‑T P.501, ITU‑T P.502, ITU‑T P.340, and ITU‑T P.581.