Amazon.com Note: Panasonic is discontinuing its popular 5100 series. Check out the newer 5200 series instead, like the Panasonic KX-TG5240M GigaRange Supreme 5.8 GHz DSS Expandable Cordless Phone with Answering System. A 5.8 GHz DSS cordless phone from Panasonic, the KX-TG5100M provides both excellent quality and a number of useful features, including an integrated digital answering system and caller ID with call waiting compatibility. By utilizing the less congested 5.8 GHz frequency and digital spread spectrum technology, the KX-TG5100M offers clear, intelligible reception even at a distance. Multiuser expandable, the KX-TG5100M supports up to seven optional handsets (plus one included, for a total of eight) and features handset-to-handset call transfer, as well as two-way intercom between the base and any of the handsets. A call privacy feature lets you determine if other handsets can join in on the conversation, while the page feature makes locating a lost handset into a snap. The KX-TG5100M features 50 caller ID memory locations and a built-in speakerphone for hands-free operation. Wall-mountable, freeing up valuable desktop space, the KX-TG5100M is also headset compatible (a belt-clip is provided) saving your neck from the strain of cradling the phone. The integrated three-mailbox digital answering system has a record time of up to 15 minutes, while remote message check lets you stay in touch even while you are away. The NiCad battery provides about 4.5 hours of talk time and 11 days of standby, while a low battery indicator lets you know when the phone needs recharging. A time/date stamp lets you know when each message was received, and a 50 number phone directory lets you easily find and dial the most frequently used phone numbers. The KX-TG5100M also comes backed with a one-year limited warranty.What's in the BoxMain base station, handset, AC power supply, battery, telephone line cord, belt clip, instructions, warranty