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Product Name:   4 Inch Hands-free B&W Video Indoor Unit
Name:    4 Inch Hands-free B&W Video Indoor Unit Model: SA-BF310 
Attestation: CCC,CE,ROHS Type: Video door phone for villa 
Parameter:  
Parameters:

Size: 180*89*33mm
Working voltage: DC15V
Working temperature: -10°C+55°C
Display: B&W 4 inch
Wiring mode: 5+1 (RVV2*1.0+RVV3*1.0+SYV75-5-96)
Ring db: ≥60db
Operation mode: hands-free
Size: 220*184*49mm
Description:
  Basic function:

4 inch CRT tube
Two-way talking, monitoring, unlocking
Support 3 indoor units to work at the same time
16 chime available
Wall-mounted installation
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