Model No.: RTB8856
Main Features&Picture(reference):

1. FSK/DTMF Compatible
2. Two-way speaker function
3. Real LCD week and date display
4.50 incoming and 15 outgoing call memories
5.16 kinds of normal ring adjustable
6. Ringer volume adjustable
7.3 groups of alarm function
8. Flash time adjustable
9.Do Not Disturb function
10.P/T dialing mode selectable 
11.Anti-thief function
12.Area code and long-distance area code setting
13. 5 levels of LCD brightness adjustable
14. One group Auto IP and two groups of manual IP setting
15.Redial and flash function
16. Pre-dial, edit and back dialing function
17.HF volume 2 grades adjustable
18. Wall mountable