●【FSK DTMF Caller ID Automatic Detection】Automatic detection of FSK and DTMF caller IDs and pre-dial numbers are 32 digits length, so you can change the number easily ●Phone Number and Talk Time Display: Dial the number to automatically check the phone number and the talk time ●Easy to use: Supports fast query records and has a call back function. When you add a dial code yourself, the outcoming code will be automatically interrupted ●Multi-functional: It can automatically filter your local phone number. The length of the phone station is 5 digits and is an electronic tabletop calendar, date, clock, and date display ●Specifications: 1 set of automatic IP, and 32-bit memory length fixed IP access number for each set