1. SET Key: Save.
2. MEM Key: Indirect memory.
3. MUTE Key: Mute microphone.
4. ‘Incoming call’ indicator light
5. Direct memory keys.
6. Numeric keypad
7. key. Hands-free.
8 key. Repeat the last dialed number.
9. ‘In use’ indicator light
10. R key. Access to the services of your telephone company.
11. Switch of the R key.
12. Hands-free volume.
13. RING TONE. Volume setting: loud, medium, and mute.
14. Auricular amplifier.
15. LINE. Input for the line cable.
16. Screw recesses for wall mounting