Amplifies personal conversations, television and radio up to 50dB. Large rotary volume and tone controls easily fine-tune sound. Lightweight, comfortable stethoscope headset with adjustable earbuds. Ability to connect provided headphones or earbuds (optional neckloop available). Interchangeable microphones--plug-in microphone, 4' lapel microphone or 10' microphone extension. Small, compact and easy to use. Hearing aid and T-coil compatible. Includes 2 AA alkaline batteries for up to 60 hours of use with headphones, belt clip, lanyard, plug-in microphone, 4' lapel microphone, 10' microphone extension, stethoscope headset, pull-string bag and extra earbuds.