6880.8 kHz LSB, seems like station may be off-frequency, but a lot of these Spanish speaking operators like using frequencies like this, lots of repeating digits....so they're probably supposed to be on 6880.8 kHz instead of 6881 kHz. Of course, Spanish language has been logged on 6881 kHz before, both USB and LSB modes.
Spanish language chatter heard on Virginia based remote SDR receiver WebSDR KiwiSDR receiver. S5-S6 signal with nice strong audio.