Clarity D703HS DECT 6.0 Amplified Cordless Handset & Charger (2-Pack) E814HS DECT 6.0 Technology 1.9GHz Extra Handsets Hearing Aid Compatible Large Backlit LCD Display Amplified Volume - Up To 40dB Extra Handset Will Only Work With: Clarity E814, E814CC, D702, D703, D704, D712, D713, D714, D722, D723, or D724