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Product Name:  Non-visual indoor phone
Name:   Non-visual indoor phone Model: SA-SF301 
Attestation: CCC,CE,ROHS Type: A series Non-visual Non network door phone 
Parameter:  
Technical Parameter
Input voltage: DC 12V
Working temperature: -10°C-55°C
Cable: 3-core bus system (RVV3*1.0)
Sound: ≥40db
Operation way: by hand
Overall dimension: 211*79*48mm
Description:
  Basic function
Plastic material
Dual talk and unlocking
Built-in decoder, 3-core bus system ,easy to install
Wall mount
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