The BT8600 Advanced Call Blocker, powered by truecalls award winning technology, offers complete control over which calls you wish to take. Introducing BTs hot key to block up to 100% of nuisance calls. Block up to 1000 numbers or block calls by type. Uses multi-award winning truecall blocking technology. Uses multi-award winning trueCall blocking technology. Telephone information: 200 name and number memories. 10 ringtones. Last number redial. Caller ID. Call log. Call divert. Handsfree facility. Speaker and ringer volume control. Up to 21/ hours talktime/240 hours standby. Up to 50m indoor range/300m outdoor range. Out of range indicator. Low battery indicator. 3 - Blocks a specific list of numbers and has either a virtual answering assistant or audible name announcement. Answer machine recording time 60mins. Personalised recording facility.