Dual Tone Deep Pitch IC Ringer with 3 levels of control
Patented Volume Plus Button designed with features for the hearing impaired aiding 70% of elderly users with high-frequency hearing loss (the Boost Button increases volume range to 27.5db)
True DTMF
Standard Clear Plastic Face Plate With Changeable Graphic Sheet (Customization Available)
Outstanding audio amplification quality
Extra Large Super Bright Ring/Message Waiting Indicator
Constructed of High Impact ABS Plastic
Full Range Volume Control (maximum amplification as allowed by law)
Compatible With AC And DC Neon And Some LED Systems