It's the exact same size as a Raspberry Pi Zero but works with any and all Raspberry Pi computers with a 2x20 connector - A+, B+, Zero, Pi 2, Pi 3, etc. On Adafruit tested it out with Raspbian (the official operating system) and Retropie.
This Bonnet uses I2S a digital sound standard, so you get really crisp audio. The digital data goes right into the amplifier so there's no static like you hear from the headphone jack. And it's super easy to get started. Just plug in any 4Ω to 8Ω speakers, up to 3 Watts, run installer script on any Raspberry Pi, reboot and you're ready to jam!
Each order comes as a fully tested and assembled PCB and 2x extra terminal blocks. No soldering required if you're using our 3 Watt speaker set, just plug and play. You can either plug one of enclosed speaker sets right into the JST jack in the middle or you can solder the terminal blocks in and then connect any speaker you like like our 4Ω 3W or 8Ω 1W. You can even use a surface transducer!