Amazon has this Wi-Fi Smart Plug that works with Amazon Alexa for $9.99 with promo code HNIDEKPR.
Linky: Wi-Fi Smart Plug [amazon.com]
Promo code: HNIDEKPR
Price after coupon $9.99
List price is $19.99
- No Hub or monthly fees required. Control your plug globally with Wi-Fi access.
- Plug a device, download app. start to remote control this item. Get Tuya Smart downloaded from App Store or Android Market. Then add the plug to the APP according to user manual.