... warrant AXON HOT-SELLING easy use BTE hearing aid F-137 *AXON,hearing aid factory for 9 years*Mini size ,ligt ... of Fonix 6500-C,Fonix 7000 and CR6128 Model:F-137 BTE Hearing AidMax Sound Output:127dB ± 4dBMax Sound Gain:48dB ... Carton20kgs AXON HOT-SELLING easy use BTE hearing aid F-137