Clarity BT914HS Severe Hearing Loss Cordless Handset (2-Pack) - extra handset for Clarity BT914 BT914HS DECT 6.0 Technology 1.9GHz Extra Handsets Hearing Aid Compatible Digital Clarity PowerTM Technology -Increases Volume for Soft Sounds -Decreases Volume for Loud Sounds Amplified Volume - Up To 40dB Extra Handset Only Works With: Clarity BT914