Cordless telephone for the hearing impaired: large contrasting keys and large illuminated display Headset volume up to +50 dB, ringtone up to +80 dB Compatible with hearing aids Additional optical call display VIP function: find out who you are accessible to. SOS button: up to 4 storable emergency call contacts answering machine with 30 min. Recording time and lens playback function 9 direct dial keys on handset (19) voice announcement of key presses in 4 languages caller detection phonebook: up to 50 entries, 4 with voice announcement Voice callback: last 10 numbers Blocking up to 100 unwanted numbers Call duration: 10 hours; Standby time: 2 days Range 50 m indoors, 300 m outdoors - 7 menu languages - Energy-saving and environmentally friendly DECT U.L.E technology - Contents:.