$20
Insignia - Voice Smart Portable Bluetooth Speaker and Alarm Clock with Google Assistant. Two available, $20 each OBO! (The cheapest I could find was $40 on eBay).
https://www.insigniaproducts.com/pdp/NS-CSPGASP2/5865906
Multiroom compatible portable speaker: Plays music in multiple rooms at once.
Google Assistant built-in: Ask questions. Tell it to do things. It's your own digital assistant.
More ways to connect with the music you love: Bluetooth and Wi-Fi capability for pairing wireless devices.
Rechargeable battery: Enjoy up to 5 hours playback with a large built-in battery.
Simple setup: Put your Insignia wireless speaker in any room where you want music and connect it to your home Wi-Fi network. With the touch of a few buttons, you're ready to enjoy multiroom music.
Clock Display: The speaker features a digital LED clock display and has a built in alarm clock.
Please do not message this poster about other commercial services.