Instantly Converts Any Corded Phone!Increases Volume Up to 35 Times! Now you can instantly convert any corded phone into an amplified phone with this powerful, portable telephone amplifier! Can amplify up to 30 DB and significantly increase the volume up to 35 times. It is perfect for anyone with moderate hearing, noisy areas or environments. It makes sounds not only louder, but also clearer and easier to understand. You will hear more without straining, missing words or asking callers to repeat themselves. Easy-to-install, lightweight one-piece unit is small enough to take anywhere. Simply install the batteries-and plug it in. No wiring needed! Great for travel. Features an on/off switch, volume control and low battery indicator. Requires two "AAA" batteries (not included). 2 1/4" x 3 1/2" x 1 1/2". Durable plastic.