Anvay:
TDA2030A 18W Digital Audio Amplifier Board
Sound like a corrupt ebay seller statement.
The TDA2030 is an ancient analogue audio chip, commonly used in 5watt guitar practice amps.
Expect no more than 4watt RMS with a 4ohm speaker on a 12volt supply.
And 2watt RMS with an 8ohm speaker.
Leo..