Bluetooth 5.1 Audio Amplifier Board, ZK-AS21 2.1 CH 220W x 2 + 350W HiFi Subwoofer Power Amp Mini Digital Audio Amp Module for Home Speakers(30-220W, 3-8Ohms), DC 16-38V, BT USB AUX Input
| Country | USA |
| Manufacturer | Indiana University Press |
| Binding | Kindle Edition |
| ReleaseDate | 2016-12-05 |
| Format | Kindle eBook |