CLA 40 Vox (Back to product)   Home » Phones 4 Elderly & Special Needs » Telephone Amplifiers   CLA 40 Vox Discounts Apply ! Free Delivery Over £50 Telephone Ringer Amplifier Key Features · Receive volume up to 30dB . Up to 40dB gain with boost volume button · Receiving tone control bass -10dBmax, Treble -10dB max · Voice detection on/off . Automatic detection of best frequency makes it compatible with 99% of modern phones . Simple connection   Black/White: Please Select...Black White Email Friend Price: £19.99     « Previous | Next »