SM SO301
SM-SO301 with an FCC ID of 2AJ5F-SM-SO3015 has 4 mains power and 4 USB ports. Each mains power is independently controlled and the USB group is controllable via a solid state relay. The ESP8266 module inside is a TYWE3S by Tuya.
Model purchased SM-SO301 (it seems to change on Amazon and other places, search for the model#). Other resellers may sell the same unit with various mains voltages/plug types.
Also sold under the Vivitar name model HA-1007-ACD (US version). There is also an HA-1007-AU (AUS version).
Product~
Flashing and Configuration Pictures~
Hold/Attach the GPIO0 wire/pin to ground during initial boot to flash. (TX pin to RX pin and RX pin to TX pin on USB flash adapter)