This Clarity telephone delivers improved sound quality with up to 115 dB (30dB above normal phones). It meets all requirements of the American Disabilities Act for volume control with a loud ringer so it can easily be heard by persons with mild to moderate hearing loss. Ideal for individuals preferring greater sound clarity than a standard phone. The phone also offers 900Mhz technology. It automatically selects the clearest of 40 channels. Continuous talk time of 4 1/2 hours on a full charge (fully charges in 10-14 hours). Low battery indicator and 10-number memory speed dialing. Call waiting with mute/redial. Tone and pulse. Easy-to-read number pad. Handset: 7 1/2" H x 2 1/4" W x 1 1/2" D. (8.25 oz.) Base: 8 1/2" H x 4 1/2" W x 2 1/2" D. (9.75 oz.)