Small size driver Peerless PMT-40N25AL01-04, 4 ohm, 1.6 x 1.6 inch inch
Amazon.com: USB Speakerphone, Lepist Computer Speakers with Micrphone for Home Office Conference Calls, Laptop Mic with 360° Voice Pickup, Touch Control, Noise Reduction, Mute/Unmute, Volume Control, LE2101 : Electronics