The Panasonic KX-TGWA40B Desk Phone Accessory connects to the corded Base Station (KX-TGW420B, sold separately) for your home office or small office. Connect up to four telephone lines and grow this business phone system as your business grows, connecting up to 9 extensions total to the base unit for a complete, customizable phone system. Enjoy features like unit-to-unit intercom so you can talk to your coworkers, or dedicated do-not-disturb button for when you want to focus on work. A programmable speed-dial allows you to store up to 30 numbers and dial with the push of a button. And, this corded phone desk extension doesn’t require a landline – simply plug into a power outlet and wirelessly connect to the main base unit. DECT 6.0 technology ensures you have long-range, interference-free call quality.