Key Features . Accessory keypad compatible with the Yale HSA AlarmsIdeally used by a rear door or upstairs as an addition to the main control unitIncludes panic buttons for attracting attentionCan be carried around giving added flexibilityCan be added at the time of installation or at a later date Compatible with Yale essential alarm kit. Keypad can be used to set or unset the alarm by anyone who has the access code. Ideally used by a rear door or upstairs as an addition to the main control unit. Includes panic buttons for attracting attention. Can be carried around giving added flexibilityWireless and; Easy To Pair With Your Existing Hsa Alarm Allowing You To Extend Your System To Suit Your NeedsThis Accessory Can Be Used To Arm Part Arm Disarm Or Emergency Trigger Your Alarm System. The Disarming Function Is Protected By The Users Pin CodeMultiple Key Pads Can Be Used Throughout The Property (E.G. Front Door Back Door Upstairs) What\'s in the Box . 1 x Keypad4 x Fixings. .