DANAVOX ANTHE 598 DWT SP BTE- NOISE TRAKER II, EXPANSION ,TSG NATURE SOUND, MADE FOR I PHONE, EAR TO EAR COMMUNICATION,NATURAL DIRECTIONALITY, DFS ULTRA II,WIND GURD, SOUND SHAPER, ACCEPTANCEMANAGER,PHONE NOW & COMFORT PHONE, TV STREAMER 2, MICRO/MINI/MULTIMIC, PHONE CLIP,REMOTE CONTROL,TV STREAMING BASS BOOST, MIC STREMING BASS BOOST. 12 CHANNELS, BATTERY SIZE 675, FITTING RANGE UPTO 60-120DB, FOR SEVERE TO PROFOUND HEARING LOSS, 2 YEARS WARRANTY.