NAPCO GEMINI WIRELESS KEYFOB / EMERGENCY PENDANT TRANSMITTERFOR USE WITH THE GEMINI SECURITY SYSTEM BY NAPCOThe Gemini Wireless Keyfob has a 4-Button operation: 2 for On/Off of security system and 2 programmable for Auxiliary functions (panic, medical, any 2 of the panels eight groups of relays, instant or home automation & X10 remote control). The Fob features a visual indicator which confirms transmission or low battery. Audible panel “chirp(s)” on arm/disarm. For added security, Low Battery is also displayed at keypad.Includes: key ring, neck chain, battery, 2 & 4 key (button) sets and plugs for unused key holesGEMINI WIRELESS: PROVEN TO OUTPERFORM THE COMPETITIONNapcos crystal-control Gemini wireless products have been proven by an independent testing laboratory to outperform competitive products, with long-range RF reliability, as much as 50% higher than other brands. Geminis uncommon crystal-control precision and unidirectional circuitry, ensures the wireless/hardwire systems you provide your customers will dependably deliver the security and trouble-free, peace-of-mind they deserve for many years to come. All Gemini panels and receivers seamlessly support the full line of Gemini transmitters and virtually all panels, keypads, receivers and peripherals are compatible with each other and work the same, model to model.