The product on this page comes with a 13 months **from the date of purchase regardless of brand new or used products. The following registration functions can be used on the parent unit. One-touch dial function allows you to register the other part frequently and send it immediately. One-touch dial button on the parent unit. Equipped with a "annoying prevention" function that sends a warning message to the other one before the call sounds are sounds. Display the absent call history (date and time only). Send a warning message to someone Equipped with a "inconvenience prevention *1" function. Auto warning message to the opponent before ringing Alternates between the call and the alarm announcement during an incoming call. In addition, when you answer a call, you can record one call (up to about 10 minutes). By using SD card *2, you can also increase the recording time and number of recordings. Equipped with an easy-to-read "incoming call notification LED" that lights up. Equipped with an LED light to notify you when you receive a call. Even if there is a missing call or an absence of reminder, it will flash slowly to notify you that you have an incoming call. Displays missing call history (date and time only) without a number or display agreement. Even if the number display is not used, you can still leave a call history. It can record up to 30 dates and times of your phone (phone number is not displayed). 1 setting is required. 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. 2. You need to set the SD card on the main unit in advance. SD card sold separately. When you set the SD card, you can record up to 1,000 records. Before the call sounds the unit will answer and send a message to the opponent to record calls. Annoying call prevention: Set "annoying prevention*" to answer the call before the call 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.