• Compact, portable, in-line amplifier that plugs between handset & base    
• Amplifies incoming calls up to 40 dB with adjustable volume    
• Tone selector amplifies specific frequencies for optimum clarity    
• Boost button used to maximize amplification    
• Not designed for cordless or trimline phones    
• One year warranty        
• NOTE: battery operated (9 Volt, included); for AC powered option, see CS-WIL95

*Boost button eliminates background noise and feedback by muting the microphone in the handset when pressed.  Release boost button when speaking.