Cordless fax headset with plenty of functions; Equipped with an annoying call conversation function after calls, and a complete countermeasure to prevent spunk calls. Equipped with an easy-to-read "call notification LED" that lights up and makes it easy to understand. Supports SD cards that can leave received fax and phone content (sold separately). Before the call sounds are sounded. The unit will answer the call to the other recipient. Set the "annoying prevention*" to reply the phone before the call ring ring sounds and send a message to the opponent to record calls. During incoming calls, alternate between the call and the alert announcements, and automatically record the call content when you answer the call. By using an SD card (sold separately) you can increase the recording time and number of recordings. It also has a "junk call consultation" function that allows you to play and listen to the other party while you are talking with a third party. *If you use the number display service, the anti-bothering function will only work when it comes from someone who is not registered in the parent phone book. You can send a message to leave the name first for the recipients name. When you dont know whoever you are, you can see it before you leave. When you do not answer a call, you can send a message to hang up the call. Equipped with an extension unit that is easy to understand and light when there is an incoming call with an LED light that will light up and notify you of an incoming call. Flashes when incoming calls, so you can easily notice the call you have been caught when you make a call by a vacuum or other sound that is hard to hear the calls. In addition, when there is an absent call or home recording, it will flash slowly, making it convenient to tell you that there is an incoming call when you get back from the house. The parent receiver is cordless, so it is easy to take and take it off. The parent receiver is cordless, so you can easily change it from a distant room. It can be used near the parent unit, as a traditional handset, or in a location far away from the parent unit, it can be used like a handset. Easy to use design and easy to read white backlight LCD KX-PD550 each part name *1 about 3.5 model: about 1.7 x 3.0 inches (44 x 77 mm). The size of the viewing area (LCD panel size) ※2 About 1.8 Model: Approx. H 1.3 x W 1.3 inches (32 x 32 mm). The size of the viewing area (LCD panel size) ※3 About 1.8 Model: Approx. H 1.3 x W 1.3 inches (32 x 32 mm). The size of the viewing area (LCD panel size)