KX-TG6533B is an expandable digital cordless phone with answering system with 3 handsets. Dect Plus technology takes the superb sound quality and outstanding range of DECT 6.0 phones to a whole new level. By increasing the frequency of error correction up to 80x, the transmission quality is improved and the phone's range is extended. Engineered to work in 1.9GHz frequency, DECT 6.0 phones won't conflict with common wireless devices such as 2.4GHz routers, wireless keyboards and mice, microwave ovens and other household items. And because it's digital, you'll enjoy long range and clear sound while deterring eavesdropping. Intelligent eco mode automatically lowers the power consumption when you're using the handset close to the base unit. Not only does it extend the available talk time, it's good for the environment. When less power is used by the handset to communicate with the base unit, battery life is prolonged which results in less frequent charging and can result in fewer batteries in landfills. Store the caller ID info of any and all unwanted callers into your home's call block list so that you can eliminate future pesky calls from them. After their information is stored, they'll get a busy signal if they call you again. Now you can program each handset to ring or not at your discretion. For example, before you go to sleep, set the bedside handset to silent mode so that it won't ring for the duration of your slumber. In the meantime, the handset in another room is unaffected, and rings as usual. Handsets feature a sleek, low profile base unit with a reversible pedestal. These models are ideal for kitchen use because they do not take up a lot of room on a desk or countertop, and they can be quickly and easily mounted to a wall by using the reverse side of the pedestal.