PSIER Open Ear Headphones, Bluetooth 5.3 Wireless Sports Headphones with Digital Display Charging Case 40 Hours Playtime True Earbuds with Earhooks for Running, Walking, Workout

Product description is a bit vague
Now that I’ve used these for a few days, I hope I can answer a few of the questions that I had before I clicked “Order.”Overall, this seems to be a very well-engineered product, both ergonomically and functionally.This is a pair of complementary (left and right) earpieces. Both can be used simultaneously, or either one can be used by itself, as a handsfree mobile phone headset. Both pieces include a microphone and a touch control.The case is a charging buffer: you charge the case by connecting it to a USB-C line connected to a power source. The case, in turn, charges the earpieces. The earpieces have to be in the case while it charges. When you put an earpiece into the case, it connects to two tiny electrodes to charge. The case will charge one or both earpieces. A digital readout shows the charge remaining on the case. The marketing says 20 hours of battery life for the earpieces and 40 hours on the case, neither of which I have put to the test. However, I have used them for several hours which barely reduced the remaining charge. A total of 40 hours is plausible, if your host device is using Bluetooth 5.2 or higher (BT 5.2 includes LE Audio, which reduces battery consumption).The case has a hidden gentle magnetic closure, which keeps it closed when it is in a pocket or, I presume, a purse; there are likewise magnetic stays for the earpieces so if you open the case upside down they won’t fall out.When the product is just out of the box, there is tape over the electrical contacts; it must be removed to charge. There is also tape over the digital display which should be removed.Each earpiece has a touch control (the product photo shows a bright blue fingerprint for illustrative purposes only–the product does not have a blue fingerprint on it). Tapping the left turns the volume down, tapping the right turns the volume up. If you are listening to music, a long press (2 sec) on the left jumps to the beginning of the song, or (if you are close to the beginning already) to the beginning of the previous song; a long press on the right jumps to the beginning of the next song. All other actions are identical for either left or right: double tap to pause or restart a song, or to answer or end a call. If a call is coming in, a long press rejects the call. A triple-tap activates Siri, if you have Siri available. A quintuple (5x) tap activates “Gaming mode” which reduces the lag (small delay which is always present in a Bluetooth connection).Changing the volume, FF/RW, and answering or ending a call can still be controlled as normal from the host device. I presume Siri can be activated as well, but I don’t have an iPhone so I cannot confirm.While these are not intended to give top-shelf sound reproduction, they get the job done well. Volume is good, and I don’t hear any hiss or pops.Because these are over-the-ear, nothing sits inside your ear canal and ambient sound is not at all suppressed. This is good for listening to music in the office. I never know when a coworker might show up behind me and wants to ask a question, and since I have long hair, they can’t see the matte-black earpieces; they just start talking. As long as the volume isn’t set to “earsplitting,” I can hear normal conversation.I wear wire frame glasses and do not find that these earpieces interfere in any way.Cons:The shape of the “hooks” is fixed and goes about halfway around the ear, so it is easy to accidentally knock them off my ear. But as long as I’m not too much of a spaz when I toss my hair back it isn’t a major problem.Also, the case hinges along one side (see product photos) but when it is closed the surface is quite smooth and symmetrical. This makes opening the case a little difficult–it can be hard to get purchase if you are wearing mittens. If it’s dark and you can’t see which way you are holding the case, you might be trying to open the hinge side, or you might be holding it upside down. A bit of tactile feedback, such as grooves or ridges, would be an improvement.