The Link2Home Smart Alarm Door/Window Sensor provides up to 80m open field Zigbee transmission (3.0). It can be used with other Link2Home devices, or used to trigger them. This includes lighting.\nBattery powered (supplied) with low power indication and tamper protection.\nRequires smart alarm hub (L2H-SECUREGWAY), includes spacers.\nSpecification:\nTransmission Range: 80m\nBattery Life: up to 24 months\n\n--\nOur eBay Store\n\nPlease note: This item has a longer lead time for dispatch then normal as it's a non-stocked item that is ordered in, please see the estimated delivery date by eBay. We will of course ship the item sooner if possible.\n\nLink2Home L2H-SECURECTSEN Smart Alarm Door/Window Sensor\n\nProduct Details\n\nThe Link2Home Smart Alarm Door/Window Sensor provides up to 80m open field Zigbee transmission (3.0). It can be used with other Link2Home devices, or used to trigger them. This includes lighting.\nBattery powered (supplied) with low power indication and tamper prote;