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Yiwu Trump Medical Products Co.,Ltd 3yr.
Contacts:Zhu JiacaiChat
Mobile:86-18969394979
E-mail:sales01@trumpmedi.com
max sound output: 129db ± 4db
max sound gain: 50db ± 5db
harmonic wave distortion: ≤5%
frequency range: 450~3500 hz
input noise: ≤30 db
battery: ag13
working voltage dc1.5v
working current: ≤4ma
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