Simple plug and play.
I used it with my samsung flip 4, just plugged it in and it appeared as an external microphone, stereo recording in recording apps.
I also asked someone with an iphone to test the lightning receiver (the kit comes with 2 receivers, lighting and usb-c), and it worked instantly for them as well.
Unfortunately, you can only use one receiver at a time -- we tried both phones with receivers and only one was connected.
The mics themselves were smaller than I expected, which is really nice for interviews where you don't want the mics to be seen, but also don't have the budget or the space to have a boom mic. The magnets are pretty good, and the sound quality is good as well.

Great value for 2 mics+ receiver with long battery life at this price point. I am entry level with video creation and trying to run ads for my business—I really liked how easy it was to setup, configure and provides clear audio quality. The magnets are very strong too. I found that mounting the mic inside my shirt (+ wind screen) with the square magnet piece on the outside provided a great sound and keeps the mic very low profile—can barely tell it’s there.

I didn’t like that you can’t connect a wireless microphone but everything else is fine

The Boya Omic Wireless Mic is an impressive and cost-effective option that continually improves over time, now featuring a convenient charging case and significant sound enhancements. Compatible with computers, Android/iOS devices, and more, it's perfect for content creation, live streaming, Vlog filming, and mobile journalism. With outstanding sound quality, adjustable noise reduction, and an impressive wireless range of up to 50 meters, it ensures clear audio and flexibility. The portable system also has built-in rechargeable battery with up to 5 hours of runtime, extendable to 20 hours with the charging case, which supports wireless charging for added convenience.

Got this camera to spy on my cat and other animals in our backyard. It works great for wildlife too because those animals don’t see you anywhere near but you can see and hear them, and also capture them on video and take pictures of them. Works with solar batteries and requires no actual batteries or wiring. Great invention!

This wireless outdoor surveillance camera works where Wi-Fi and power are not available. With a NANO SIM card, the camera is only activated when it has detected a moving object. This reduces data consumption.
The schedule function (UBox APP ) activates the camera only when needed and saves unnecessary notifications.
With an SD memory card, you can bypass the paid cloud usage.

Feel like a spy answering my phone on my sunglasses and listening to music.

This is a solid microphone for the price,, I am very impressed. I filmed a take outside on a very windy day and did not hear any feedback on the recording. It is also very discreet and it couldn't be seen in my video, but also didn't pick up any noise from my hair, which is a problem for other sensitive microphones. It was easy to pair the microphone and the receiver, and the receiver worked great with my IPhone. 10/10 would recommend!