Ness alarm kit DPlus Base panel + KPX keypad K-9511-KPXThe Ness RK5 Two Way Radio Key is a versatile and compact fully waterproof Radio Key with 5 buttons programmable to NESS and ELK Two Way Radio interfaces. 5 Colour coded buttons 915 927MHz operation with 20 frequency hopping channels for enhanced security Dual colour LED display for radio acknowledgment, low battery, armed and alarm state. Battery voltage and low battery reporting to compatible devices. CR2032 3V Lithium supplied (replaceable)