Three devices. They all do the same thing (IR Transceiver) using the same app (Tuya smart home?) I hate apps. These are Bluetooth/wifi devices. They could simply host web pages and an API. Instead you must use their app. To that I say NO! So let's find out what makes them tick. There's no screws on these, so time to bring out the opening tools. Not bad. Just a few clips. A wiggle here and a wiggle there and it's open. The IR Filter plastic doesn't look transparent at all, and it's kind of thick. I tested the IR filter with my IR fan remote, it worked perfectly. Here are pictures through the filters. I'm no light spectrum'ologist person, but wouldn't the pinkish one be a better filter? First look at the PCBs, Two have the same CBU WiFi module, one is different, the w3bs. CBU Module Datasheet: https://developer.tu