With effective call blocking & bright colour screen, the BT 8500 Cordless Phone with Answering is perfect for any home.  Call Guardian The BT 8500 Cordless Phone  incorporates award-winning true Call call blocking technology to provide Call Guardian, a unique feature that is designed to help you block every unwanted phone call from getting through. Call Guardian screens any unknown number & asks the caller to give their name before ringing your phone & asking whether you want to receive the call. You can then choose to accept, block or send the call to the answering machine. Advanced call blocking Along with being able to block individual & withheld numbers, Advanced Call Blocker lets you block specific area codes, calls from payphones & international numbers. The Do Not Disturb mode is ideal for when you want some peace & quiet as it doesn't ring or light up when you receive a call. However, any contacts in your phonebook tagged as VIPs can always get through so you're not completely cut off. Easy to use The 60-minute answering machine, phone options & Call Guardian setting are easy to manage thanks to the colour screen. At 1.8 it's big enough to be clear when texting or managing messages without interfering with the compact handset size. The keys are backlit too, making it easy to operate at any time of the day. Block up 100% of nuisance calls with the BT 8500 Advanced Call Blocker Cordless Phone. * You must subscribe to a Caller Display service from your network provider for the nuisance call block feature to work. Charges may apply.