Panasonic's KX-TGA6644B DECT 6.0 PLUS Expandable Digital Cordless Telephone has an answering system and four handsets. The DECT 6.0 PLUS technology means increasing the frequency of error correction up to 80 times, improving the transmission quality and range. A powerful battery back-up system keeps you connected when the power goes out so you can make and receive calls with the cordless handset.
Other Answerer Features
The Intelligent Eco Mode automatically lowers the power consumption when you are using the handset close to the base unit. The Range Boost technology extends transmission range by up to 20-percent so you can keep talking as you keep walking. Other features include Tone Equalizer to control bass, mid-range or treble tones in a caller's voice and Talking Caller ID and Call Block (with required subscriptions).