Model: BS-4009A
* FSK/DTMF compatible
* Max 100 groups incoming call memories(most recent)
* Max 50 groups outgoing call memories(most recent)
* Block 1000 groups unwanted phone numbers
* Block 5 groups area codes or prefixes(1-5 digits)
* 4 levels LCD adjustable
* Block calls with no phone number displayed or private calls
* Blue backlight function
* Retain stored data if lose power
* LED indicator for incoming call
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