1,One key connect(+10,+8,+5,+3,+0).
2,Flash time adjustble to fit for different exchange and three way talk, standard flash time is 600ms.
3,14 digits memory.
4,16 kinds of ring melody selectable.
5,Speaker volume 
4 levels adjustable.
6,Ring volume 
4 levels adjustable.
7,Handsfree, redial, 3 way conference.
8,Music on hold.
9,Pause key.
10,Mute key.
11,Auto hang up.
12,Dest and wall mountable.
13,Data socket.
14,Thunder-proof and Anti_EMI design.
15,waterproof and moistureproof.