The ADDvox7? is ideal for assisting communication in noisy environments-such as restaurants or crowded gatherings-for individuals with temporary or permanent voice impairments and for those who rely on an electronic speech aid, voice prosthesis or who use esophageal speech. The ADDvox7? is a portable voice amplification system that increases a user's vocal volume up to 15dB without any feedback. The 7 watt ADDvox7 is ideal for assisting communication in noisy environments-such as restaurants or crowded gatherings-for individuals with temporary or permanent voice impairments and to help those who rely on an electronic speech aid, voice prosthesis or who use esophageal speech. The ADDvox7 can also be used for tour guides, exercise instructors, tradeshow demonstrators, athletic coaches and more. The ADDvox's lightweight headset microphone picks up even the slightest whisper and can be comfortably worn for extended periods. For maximum efficiency, the 7 watt amplifier has a built-in high-capacity NiMH rechargeable battery power system for up to 14 hours of continuous use. The amplifier is lightweight enough to wear at the waist. Includes: Amplifier Lapel and headset microphones Travel/storage case 8 NiMH batteries with charger Feature Details Brand Addvox Mfg part # TR997KT110 Warranty One year warranty Color Tan / Beige / Natural Weight (lbs) 2.12 Battery operated? Yes (batteries required) Batteries included? Yes Battery details (8) AA NiMH Country of Manufacture China