siappverCheck out the iSolo's indiegogo page https://www.indiegogo.com/projects/isolo-wireless-acoustic-guitar-microphone
K&K Pure: http://store.kksound.com/acoustic-guitar-pickups-microphones/pure-mini/
L.R. Baggs Lyric: http://www.musiciansfriend.com/acoustic-guitar-pickups/lr-baggs-lyric-acoustic-guitar-microphone?source=3WWRWXGB&gclid=CjwKEAjwiru9BRDwyKmR08L3iS0SJABN8T4v81sbKkqHll4VcgVaD-73s-jsS0iU7uYBd05f2SiR4xoC8knw_wcB&kwid=19959388920x8011105460x151905500
Fishan UST: https://www.google.com/search?q=fishman+ust&espvd=2&source=lnms&tbm=shop&sa=X&ved=0ahUKEwja1si5jsDOAhVDKiYKHVrUBk0Q_AUICCgB&biw=1440&bih=799#spd=1808625025773585064