It's not a dimmer switch buzz. That's caused by the dimmer on the mains affecting the voltage signal. Shouldn't use mains dimmers on smart bulbs anyway as the dimmable feature is within the bulb...

I bought four KP105 switches around a month ago and have three of them with halogen uplighters connected to each, and the fourth has LED under counter strip lights connected in the kitchen. Daily,...

@TP-Link Hi, In answer to your questions: 1. I bought three KL110B on Dec 1 2020, all three made these noises from the start. I noticed it immediately. 2. See attached. These are amplified samples...

I just got three KL110B and noticed they all make this noise. It's only noticeable when quiet. It's a faint beeping, clicking noise, and yes bit like dial up sounds, and clearly the WiFi activity,...