A TV Guard or Voltage Guard. It is designed to protect electrical appliances from voltage fluctuations and power surges.
It is rated for a current of 13A and a voltage of 220-240V at 50Hz.
The device automatically disconnects the power supply when the voltage is too high or too low, and reconnects it after a stabilization period.
It is suitable for protecting appliances like TVs, fridges, freezers, and computers.