Product description from ebay website:
Replaceable Battery, Rechargeable, Adjustable Headband, Bell and Howell Micro Plus Personal Sound Amplifier New ultra micro design. Powerful amplification up to 5o DB. It's the latest advancement in high-tech hearing technology that lets you hear sounds you ordinarily wouldn't. It is smaller than the latest cell phone technology, yet it lets you hear everything even from clear across the room.Perfect for watching TV without disturbing others, theater, and nature walks. Ideal for conversations, lectures, theater, hiking, sporting events, watching TV and more. Micro Plus is a personal sound amplifier that provides up to 50 DB of sound amplification. Its very discreet and resembles a cell phone earpiece, so you no longer have to hide it. Flexible ear hook easily adjust to fit all ear shapes and sizes and converts for right/left ear war. Microplus is equipped with a volume control to adjust the level to your individual needs.
3 silicon ear tips
1 button cell battery
The Bell and Howell 8397 Micro Plus Personal Sound Amplifier has disposable batteries, volume control, and power switch.