The Chattervox is a compact personal amplification system that provides up to 15dB of a voice boost for mild to moderate speech impairments. Simple to operate with only one user control: the combined volume control/power switch. An affordable solution for people with low-volume speech. Includes: Six AA NiMH rechargeable batteries Plug in charger for up to 14 hours of continuous talk time Storage case Belt extender Does not include microphone Entire system can be recharged overnight (Option of using simple AA battery cells if rechargeables are insufficient; no expensive custom battery pack is required). Size: 8" W x 2.9" H x 2.1" D Weight: 355 gm (.78 lbs.) Power requirements: 9VDC Nominal gain before feedback: 15dB Max power output: 5W Min (at 4 ohms speaker load)