The KX-TCA101 is a mobile unit for the KX-TCD951 and KX-TCD 961 cordless phones. The Panasonic KX-TCD951 and KX-TCD961 DECT cordless phones offer innovative design and guarantee impressive performance offering significantly superior reception. The Navigation Key unique design follows the lead of the Panasonic Mobiles, by allowing phone usage to be convenient and simple on such a feature rich product. Multiple Handset capability allows for up to six handsets being registered with one base unit, without the worry of installing extra phone sockets. One handset can be operated from up to four base stations. This feature is ideal for large households, or office use.