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Product Name:  4"handfree B/W indoor phone
Name:   4"handfree B/W indoor phone Model: SA-BF312  
Attestation: CCC,CE,ROHS Type: C series non-network digital video door phone 
Parameter:  
Working voltage: DC18V
Working temperature: -10°C+ 55°C                            
Display: 4" B/W
Wiring methods: 5+1 (RVV2*1.0+RVV3*1.0+SYV75-5-96)
Ring level: ≥60db 
Operation method: hand-free
Exterior Dimension: 220*184*49mm
Description:
  4"flat CRT 
Plastic material
Dual talking, monitoring, remote unlocking
Support multi-indoor phones coordinate use
16 Chords optional
Wall installation
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