Amazon has the TP-Link Tapo S505 Single Pole Smart Light Switch (Matter Compatible; Tapo S505) on sale for $12.52 - $2 off coupon (click checkbox) = $10.52 with free shipping on $35+ or with Prime. Tip: Get 25% cashback ($2.63) with a Prime Card. Also on sale:

• The S500D model is $13 after coupon.
• The S505D Dimmer model is $15 after coupon.