ChatterVox unit Charger 6 NiHM rechargeable batteries DynaMic Headset Microphone Users Guide 1 year manufacturer warranty Amplifies your voice up too 12-18 dB for public speaking. Chattervox original voice amplifier with adjustable waist band system Ease of use with its custom carrying case With 14 hours of operating time have no worries of running out of charge. 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. Entire system can be recharged overnight. (Option of using simple AA battery cells if rechargeables are insufficient; no expensive custom battery pack is required).