Clarity MHA100 is a mobile headset amplifier designed to enhance the sound quality of phone conversations for individuals with hearing difficulties or those using their phones in noisy environments. It amplifies incoming sound up to 24 dB, making conversations clearer and easier to understand. The amplifier features Clarity® Power™ Technology, which not only increases the volume but also improves the clarity of speech. It automatically turns on and off based on voice or sound activation, conserving battery life, and requires three standard AC675-type hearing aid batteries for power.