|  | 
                
                  |  Electronic Compatibility (98% of all phones) | 
                
                  |  Easy set-up guide | 
                
                  |  Fingertip volume control | 
                
                  |  Low Battery LED | 
                
                  |  One-touch large-sized Headset/Handset 
  selector | 
                
                  |  Mute Switch | 
                
                  |  Headset Hanger (optional) | 
                
                  |  Dual power source (2 x AA 1.5V batteries 
  or DC 
4.5V 100mA Adapter) | 
                
                  |  C-Mode or E-Mode selection |