ATT handsets are famous for their latest technology and modern designs. Numerous models with different specifications are available in the market. These products are suitable for both home and office use. Some models offer connectivity of 4 devices with a central system at a time. Many of their models have an automatic answering machine. These gadgets mostly come with a caller ID option. Some of them also have a loudspeaker. The company offers them in both wired and wireless styles. Wireless devices have batteries as a source of power. Other devices also have a direct power supply option. The amount of buttons and other features varies as per the specific model of the device.