Smart Remote Control Bluetooth Ewelink WiFi Switch Relay Module 2/3/4CH 7-32V
Wireless frequency: WiFi 2.4GHz b/g/n+Bluetooth. Wireless Frequency:Wifi 2.4GHzb/g/n+Bluetooth. Your smartphone or tablet is connected to a 2.4G WIFI that can access the internet (5G WIFI is currently not supported).