Product Explain: Skype/PSTN DECT Wireless Dual phone 1.5" CSTN LCD,65K colors connected to a normal telephone socket and a USB port on a PC.SKYPE ID function The display shows whether your friends who also use Skype™, are online, and with long distance 30-100m 2.4GHz/1.9GHZ, is based on frequency hopping technology The 2-in-1 functionality is like having a second (Internet) phone line for free Multi-handsets (6 handsets max) FSK (Type I/II)/DTMF caller ID 100 groups phone book number (32 digits,10 character.) 100 groups caller ID number(24 digits, 10 character and time.) 50 groups outgoing call number(32 digits ,talk time and date.) 20 groups midi and melody 4 Level ringer volume selection in handset(off/low/mid/high) Tone/Pulse dialing mode selection in handset Recall mode selection(short,long,extra long) 6 level talk volume control Alarm clock can be set,Area cod(6digits) 4 level battery indication,4 level LCD contrast Auto Answer, Room monitor Baby Call function Walkie Talkie function ( Handset-to-Handset Intercom function ) Multi-Language Ability to participate in Skype multi-party conference calls Secure and encrypted communication Caller ID (CLIP) and Call Waiting Call Transfer between Handsets, Key pad lock