banglijian hearing aid rechargeable ziv-206 with 4 channels layered noise reduction adaptive feedback cancellation-two types of sound tubes(one unit) banglijian note:<br/>we provide one unit, two types of sound tubes and ear domes, free to choose. more choices, more convenient.<br/> <br/> 3 preset program with noise reduction<br/> *everyday mode-use in a quiet environment such as in a home or indoors<br/> *moderate noise reduction mode-use in an environment noisier than home, such as a restaurant.<br/> *noisy environment mode-use in louder environments such as outdoors, concerts, markets.<br/> <br/> features:<br/> *100% digital circuitry<br/> *rechargeable-charge 2 hours, run 20-24 hours.<br/> *4 channels signal processing-with 4 independent compression-amplification channels, the received sound is divided into different, frequency regions for separate analysis, processing and recurring.<br/> *speech noise synchronization detection optimization<br/> *adaptive, layered noise reduction to reduce background noise<br/> *acoustic feedback cancellation<br/> *5 digital volume levels- with prompt tone, clearly know the volume level.<br/> *one finger operation-easily change the volume and program, adjust to your listening environment.<br/> *automatic memory-if the device is turned off, the program and volume selection always remains the same until changed by the user.<br/> <br/> package includes:<br/> 1 banglijian hearing amplifier ziv-206<br/> 2 slim sound tubes and 10 ear domes (one left side and one right side)<br/> 3 thick sound tubes and 6 ear domes<br/> 1 shockproof case<br/> 1 cleaning brush<br/> 1 power adapter and 1 usb cable<br/> 1 user manual<br/> <br/>