There are around 60 compatible free Alexa skills that work with these buttons.
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Get an Echo Button 2-Pack for $14.99 at Amazon. Shipping is free with orders over $25 or with a Prime Account. That's the best price by $5. These are interactive accessories that work with Amazon Echo devices to play games such as Trivial Pursuit or Fourth Down sports trivia. Up to four buttons can be connected at once. Sales tax is charged in most states.