Clearsounds Vox Telephone Amplifier with Boost & Tone Control

• Receiving volume control up to 30dB and up to 40 dB gain with "boost" volume button
• Receiving tone control: Bass -10dB max, Treble -10dB max
• Automatically switches ON/OFF - voice detection
• Light and portable
• Automatic detection of best frequencies band makes it compatible to 99% of modern telephones
• Sleek modern design
• Simple connection

Please note: this item is for use with basic analogue corded phones.  It is not compatible with digital phones, cordless phones, or phones with answering machines, fax dialers, caller IDs or other peripheral features.