* Supports StayD mode  * 4-wire expansion bus  * Expandable to 32 zones  * Expandable to 16 PGMs  * 2 Partitions  * 32 User Codes  * Supports PCS Series  * Supports IP100 Internet Module  * Supports VDMP3 Plug-in voice dialer  * Supports REM3 hand-held remote keypad - require RTX3 V1.31 or higher  * Supports iParadox app  * In-field firmware upgradeable via a 307USB  *In-field Firmware Upgrade Software for SP65  * Menu-driven programming for the Installer , Master and Maintenance codes  Multiple phone numbers : 3 for monitoring station , 5 for personal dialing and 1 for pager reporting (SP65 : via PCS200 only - GSM reporting)  * Patented 2 opto coupler dialer circuit - the most reliable dialer in the industry - US Patents 5751803 , RE39406  * Automatic Daylight Savings Time feature  * Push button software reset (reset to default values and restart)  *Direct connect at 9.6k baud : BabyWare for SP4000/SP65  * 256 events buffered  * Fits in 20 x 25.5 x 7.6cm and 28 x 28 x 7.6cm metal boxes .   Model :  PA5171   Manufacturer :  Paradox