XINGMA XM-919T 300~4500Hz Wired Voice Amplifier w/ Earphones - Beige (1 x LR44)
Brand XINGMA Model XM-919T Color Beige Material Plastic Quantity 1 Power 1 x LR44 battery (included) Functions This is for the audition obstacle patient to raise the audition Wearing Mode In-ear Maximum loudness 133 +/- 4 dB Sensitivity 48 +/- 5 dB Frequency response 300~4500 Hz Noise = Cable length 110 cm Features Adjustable volume Packing List 1 x Voice amplifier 1 x Earphones (110cm-cable) 1 x LR44 battery 1 x English user manual