Smarteefi Node Switches (Retrofitting) are the best way to bring true Automation at your Home or Office. It fits behind your existing switch plates and transform your ordinary switches in to voice assistant enabled and controllable from your smartphone. [Note: Please follow wiring diagram that comes with product, wrong wiring can damage the product permanently] Smarteefi Node switches comes in 8 variants Smarteefi Wi-Fi 1 Node 16A Smart Switch with Energy Monitoring: 1 channel outputs Smarteefi Wi-Fi 2 Node Smart Switch: Provide 2 channel outputs Smarteefi Wi-Fi 4 Node Smart Switch: Provide 4 channel outputs Smarteefi Wi-Fi 5 Node Smart Switch: Provide 5 channel outputs Smarteefi Wi-Fi 5 Node (4 Node + 1 Fan Node) Smart Switch: Provide 5 channel (4 channel outputs for ON/OFF and 1 channel for fan speed control humming noise free design) Smarteefi Wi-Fi 6 Node Smart Switch: Provide 6 channel outputs Smarteefi Wi-Fi 6 Node (5 Node + 16A Node) Smart Switch: Provide 6 channel outputs (5 outputs for Light + 1 out for 16A appliance like AC, Geyser, Motor) Smarteefi Wi-Fi 8 Node Smart Switch: Provide 8 channel outputs TECHNICAL SPECIFICATIONS Operating Voltage:   110-240V AC Max Load Per Node (5 Nodes):    500W Resistive Load Max Load 16Node (1 Nodes):    3500W Resistive Load Max Load Total:  2000W+3500W Resistive Load Two Way Connection:  No Operating Frequency:  50/60 Hz Surge Protection:  Yes Manual Override:  Yes WiFi Frequency:  2.4GHz b/g/n