Hearing aid compatibleAdjustable receiving volume : up to 22dB4 one-touch photo keys : 3 x 2 cmAdjustable speaker phone volumeMemory storage1 battery ni-Mh 2.4V 500mA (included)Recharging base (included)Standby time : 4 daysTalk time : 8 hoursOutdoor range : 300mIndoor range : 50m Is compatible with: AmpliDect295AmpliDect295 TwinAmpliDect Combi 295