The frequency of 639 Hz helps balance emotions and elevate the mood. It also promotes communication, love, understanding, & brings harmony into interpersonal relationships. The is perfect when you need a significant boost of love & positivity. Benefits of 639Hz Solfeggio Frequency: ✓ Remove Negative Energy & Emotions ✓ Promotes Calmness ✓ Facilitates Postive Change ✓ Balance the heart Chakra Mp3 Length: 1:00:00