Amazon has the Schumacher 100-Watt Mobile Power Inverter for $9.98 with free shipping for Prime members. Converts 12-volt DC to 120-volt AC and 5-volt USB Power via a three foot power cord.

Walmart sells it for the same price with free in-store pickup or $5.99 for shipping.

$9.98 Shop Now

Harman Audio is offering Up To 60% Off Select Speakers, Headphones, And More as part of their Easter Sale. Prices are as marked. Shipping is free on all orders.

Amazon has the Paxcess Bluetooth 5.0 Audio Receiver / Transmitter for $30 - $12 off with coupon RBOXEJEQ = $18 with free shipping. Features aptX low latency support.

Has average Amazon Reviews.

$18 Shop Now

Walmart has the TP-Link Smart WiFi Light Switch 3-Way Kit for $45 with free shipping. Compatible with the Kasa mobile app, Amazon Alexa, and Google Assistant.

Has good Amazon Reviews, where it sells for the same price.

$45 Shop Now

Amazon has the Amazon Echo Input (Black or White) for $20 with free shipping. Echo Input adds Alexa to an external speaker and connects via 3.5 mm audio cable or Bluetooth.

$20 Shop Now