BET F-13 Sound Voice Amplifier Hearing Aid - Grey (1 x AA)
Brand BET Model F13 Color Grey Material Plastic housing + chip Quantity 1 Power 1 x AA battery (included) Functions Hearing aid Wearing Mode In-ear Maximum loudness 129 +/- 4 dB Sensitivity 30 dB Frequency response 450~3500 Hz Noise Cable length 70 cm Features harmonic distortion Packing List 1 x Hearing aid 1 x Earphone (70cm) 1 x AA battery 2 x Ear buds 1 x Chinese user manual