Cool Stars 14 - Submitted Abstract # 133 This version created on 05 October 2006 Spectroscopic properties of UV Ceti-type stars Ines Crespo-Chacon, Universidad Complutense de Madrid David Montes, Universidad Complutense de Madrid Javier Lopez-Santiago, INAF - Osservatorio Astronomico di Palermo Maria Jose Fernandez-Figueroa, Universidad Complutense de Madrid Due to instrumental limitations, time-resolved studies of UV Ceti-type flare stars have been generally carried out using photometric observations. However, high resolution spectra are needed to characterize these stars. We have analysed high resolution echelle spectra of a sample of K7 and M dwafs classified as flare stars (UV Ceti-type). The observations cover a wavelength range that includes different optical chromospheric activity indicators such as the Balmer series and some Ca II, He I, Mg I and Na I lines. Several flux-flux and flux-rotational velocity relationships have been studied in detail. The results have been compared with those reported for other cool stars, finding clear differences between them. ----------------------------------