Easy to use do-it-yourself wireless alert system notifies you if a gate or door opens for home or business security Connect in minutes with easy mounting, pairing & convenient wireless operation (uses 3 x AA batteries for Receiver & 3 x AAA batteries for Sensor)^ Position the Gate Alert & its 2 magnetic sensors on a door or gate, & If the sensors are separated a siren will trigger on the gate & on the eceiver Unit indoors It’s perfect for notifying you if children or others have opened a gate to a swimming pool area, street etc with a delay switch to allows adults to open & close the gate within 7 seconds without triggering the siren The Receiver unit emits an audible alarm & lights up when the Gate Alert Sensor detects movement Choose between 3 volume levels for the alarm on the Receiver Unit or use silent mode with blue lights flashing on the channel linked to the Sensor Enjoy the convenience of wireless with a long range up to 200ft/60m* from the Gate Alert Sensor to Receiver Expand by adding more Sensors+ from the Swann DIY Alert Range for a customized alert system for your home or business Technical Specifications SWADS-GATEAK Receiver Dimensions: 5” x 5” x 1.4” /126 x 126 x 36mm Weight: 6.8oz/194g Transmission: 200ft/60m wireless* Batteries: 3 x AA batteries for Receiver (not included) Sensor Dimensions: 4.7 x 1.9 x 0.9” / 120 x 48 x 22mm Weight: 2.5oz/73g Batteries: 3 x AAA batteries for Receiver (not included)