The Grove-Speaker Plus includes a powerful amplifier driver board and a fancy speaker. The speaker generates different tones with different input frequencies and is easy to control with the PWM signal. This grove-speaker plus creates distinctive sound effects, play favorite songs, or build own music box with easy coding or a large number of existing music code. The speaker features a good sound quality speaker with high volume and sound adjustable function with an onboard potentiometer. This grove-speaker plus is available in 130mm x 90mm x 12mm dimensions. https://elecena.pl/product/17102035/grove-speaker-plus 2020-08-08 https://elecena.pl/product/17102035/grove-speaker-plus 2020-08-23 https://elecena.pl/product/17102035/grove-speaker-plus 2020-08-25 https://elecena.pl/product/17102035/grove-speaker-plus 2021-07-28 https://elecena.pl/product/17102035/grove-speaker-plus 2022-10-18