We report the identification of a very low mass new binary system 2MASS J10274572+0629104 , based on Kepler K 2 photometry and Gaia DR2 astrometry . The K 2 light curve is consistent with a beat pattern of two periodic signals , and using Lomb-Scargle periodogram , we find two rotation periods of 0.2114 \pm 0.0002 day and 0.2199 \pm 0.0003 day . We conclude that these rotation periods arise from two stars with similar spectral types of M6 , and have near equal luminosity . It is the first ultracool binary system to be identified based on beat patterns in the light curve . Near-infrared spectroscopy yields RV = -9.8 \pm 0.6 km s ^ { -1 } , v sin i = 21.5 \pm 1.1 km s ^ { -1 } , T _ { eff } = 3110 \pm 40 K , and log g = 5.2 { \pm } 0.2 . The motions are consistent with a young age , as are the rotation periods , but the source does not appear to be part of any known moving group . Furthermore , we detected three strong white light flares in the K 2 light curve , with estimated total bolometric ( UV/optical/IR ) energies to be 2.8 \times 10 ^ { 33 } , 5.2 \times 10 ^ { 33 } and 3.8 \times 10 ^ { 33 } erg respectively .