Ecowitt Wireless Lightning Detector Sensor, Accessory Sensor for Weather Station Ecosystem, WH57

Lightning Detection Sensor: detects lightning bolts and storms within 25 miles (40 kilometers) the data can be viewed on our free WS View App after the WiFi configuration(requires a GW1100/GW1200/GW3000 gateway[sold separately]) [Accessory Sensor for Ecowitt Weather Station Ecosystem, Can Not Be Used Alone] Live Data on APP: requires a GW1100/GW1200/GW3000 WIFI gateway(sold separately) to connect to WiFi, after the WIFI configuration,you can monitor number of strikes daily, and the time & distance of the last strike detected within a 25-mile radius of your location on the Live Data page of the WS View app (view live data, requires the gateway and your phone is using the same Wi-Fi network) View Remote Data, Graph & History Records on Ecowitt Weather Server: supported to upload to our free Ecowitt Weather server(ecowitt.net) to view the lightning strikes graph and download the history records on the website; it's recommended to add a shortcut of the website on the home screen of your phone for quick access Receive email alerts from the Ecowitt Weather Server; Remote monitoring with smart phone, laptop, or computer by visiting the websit Battery power level display on the WS View App & battery alert function on the Ecowitt Weather Server Please use rechargeable batteries; standard batteries and lithium batteries may cause the WH57 to trigger incorrectly due to their high voltage.