Digital BTE Hearing Aid - "Crystal 2000" 2 Fully Digital Programmable Channels 10-band hyperfind Sound Control "Super-quiet" Digital BTE Hearing Aid - "Crystal 2000" has features as follows:2 Fully Digital & Programmable ChannelsSuper Power Available for Mild to Profound hearing lossLinear Amplification to WDRC AdjustableHyperfine 10-band Sound Control"Super-quiet" Function for High & Low ...