Xiaomi (Yuwell) Pulse Oxymeter

This was listed as Xiaomi, but is made by Yuwell model YX303. It's a standalone unit powered by 2 AAA batteries and sized 58 x 32 x 34 mm.

The unit is hinged so you place you finger in between the two halves and then turn the unit on. The colour OLED will turn on and the screen will show a waveform and your pulse rate and blood oxygen level (pO2). It takes a few seconds to get a reading.

Quick pressing the button again will rotate the display 90 degrees, then again another 90 (so 180), again 270 and again back to the start.

If the finger is removed, the unit will indicate "sensor off" and turn itself off.

As a Xiaomi product it's at the upper end of the price range and there are other cheaper units out there. It's available on import for around £20 (not available through the UK site).

Maybe Xiaomi wine bottle opener

It's hard to tell whether it's Xiaomi or not (it's sold as, but there's no branding on the opener itself).

The unit is a cylinder about 6 inches long and just wider than the neck of a bottle. It has a rocker switch on the top and 4 white LEDs to indicate charge and is clear at the bottom, so you can see the cork etc. It has rechargeable batteries and is charged with via microUSB.

It's very simple to use, please the bottom of the cylinder over the top of the wine bottle, press the bottom end of the rocker switch (make sure to hold the wine bottle too) and the screw will move down, enter the cork and then pull the cork out of the bottle. The transparent area will illuminate blue while the cork is being removed and turn red when complete. It may be necessary to slightly wiggle the unit for the cork to completely come out the bottle.

The unit should come with a foil cutter, but this one didn't have one included.

Once removed, just press the top of the switch and the cork will be ejected.

That's it. Very simple.

Why? you may ask. If anyone has arthritis or other ailment that doesn't allow them to use a normal corkscrew, this is the product for them.

It can be found on your Chinese site as the Original Xiaomi Mijia Huohou Automatic Red Wine Bottle Opener Electric Corkscrew Foil Cutter Cork Out Tool 6S and costs about £20. Definitely worthwhile if someone likes wine, but cant open a bottle.

Xiaomi Portable Air Quality sensor

The portable air quality sensor definitely isn't available from the UK Mi store, but importable.

The unit measures about 6 x 9 x 2 cm and is a plain white case with an OLED display that shows the battery charge and the PM2.5 value. It's small enough to fit in a jean's or jacket pocket.

The sensor is branded SmartMi.

There's a button on the front that turns the unit on or off and a micro-USB socket for charging and that's it. Short pressing the button while the display is on will cycle between brightness settings (low, medium, high).

While it was sensible to do so, using it on the tube (is that ever sensible?) produced interesting results, especially on the Northern Line where PM2.5 levels could reach over 160ppm (not safe) in the deeper stations. The display will show a bar that's green, orange or red depending on the PM2.5 level 0-75, 76-150 and 150+ respectively.

Internally there's fan and a laser reflection/scatter system that measures the particulates.

Available through your Chinese import site for about £20.

Xiaomi Bluetooth Speaker 2.0

Another day, another Xiaomi product. These are mini Bluetooth cylindrical speakers (they measure about 2 inches in height - well 48mm - and 2 inches across - 52mm) and the come in black or white.

Though small, the sound produced is remarkably good for the size, obviously they cant compete with bigger speakers with large bass speakers for the depth of sound, but just to have some background music, they work well.

If they can be placed apart the sound improves dramatically if you place yourself in the central zone.

The speakers are Bluetooth 5.0 and operate in stereo, however pairing can be slightly fiddly. The centre of the base is a switch surrounded by a "multifunctional switch" so when the speaker's pointing up, pressing the speaker actually presses the central switch.

• Turn on by long pressing the switch (for about 2 seconds) and the speaker should turn on (blue light will flash)
• Do the same for the other speaker
• On Both speakers double click the multifunction switch and they should go into wireless stereo pairing mode
• The "master" speaker will flash quickly and the "slave" slowly
• Pair with a phone, laptop, other BLE device

The speakers also have a microphone and can be used to receive a call (tap the speaker when a call comes in and it will change to mic mode, however this can be annoying as the speaker can go into this mode even when a call isn't there by accidentally tapping it.

The power output is only 3W and the speakers are charged through a microUSB port.

The speaker are available from any of the friendly Chinese import sites and are about £20 (inc shipping). They're never going to compete with the big bass boomboxes, but for something that will fit in a jacket pocket and provide some background music and last for a couple of hours, they're really not bad.