BOGASINGBluetooth Speaker, M4 Speaker with 40W Stereo HD Surround Sound, Deeper Bass, 24H Playtime, IPX7 Waterproof, Bluetooth 5.0 TWS Wireless Dual Pairing Portable Speaker for Home, Outdoor (Black)

love this unit. perfect for my bike setup. love the bass sound

I have two of these Bogasing M4 speakers. I use them TWS paired - for stereo. Here's a few comments that might help others.Comparisons with Other Speakers:I can only compare these to my other battery bluetooth speakers: Bose Mini Soundlink and Marshall Kilburn II. When listening to one Bogasing (in Bass Mode - Green), it sounds comparable in sound to my Bose (but the Bogasing is 1/3 the price of the Bose) and plays louder (as it has more available power and the speaker is slightly larger than the Bose). When comparing it to my larger Marshall Kilburn II, the Marshall is more accurate in sound as the Marshall has the advantage of a much bigger box/drivers, more power, and precise EQ (bass/treble) adjustments - but again the Marshall costs 4x more than the Bogasing (so...if you are willing to pay more and have a larger speaker - the Marshall is great). Now, where the Bogasing really shines for me is when you purchase two of them and use the TWS feature (which my Bose and Marshall cannot do). I am truly impressed with the sound quality, loudness, and stereo field (much better volume and soundstage than using either a single Bose and/or single Marshall). I purchased the Bogasing units because I wanted something small/portable/stereo pair that plays loud, can be outside/weather resistant, and not distort. These Bogasing speakers do this perfectly for me.EQ Settings (VOCAL, BASE, 3D) Observations:VOCAL mode (White Light) - it is bright and the loudest position (as it removes a lot of the low end which frees power for louder mid/high frequencies). I only use the VOCAL mode when loud is the only required criteria. BASE mode (Green Light) sounds the most accurate to me but doesn't play as loud as the two other EQ positions. I use BASE mode inside home. 3D mode (OFF light) seems to use the most DSP but has excellent extension of both base and vocals, is the 2nd loudest position, and does a great job of sounding full range yet not distorting. I prefer 3D mode outside.User Manual is Lacking some Info:The manual needs some help in the descriptions of the indicator lights - as the lights provide all kinds of helpful status but they are not described well nor indicated in the correct positions in the manual. There are 3 status lights: a combo PWR/BT/CHARGE (Blue/Blue Flash/Red) Light (which is above the "M" button on Left), there is TWS (Yellow) Light (also above the "M" button on Right), and a EQ (White/Green/Off) Light (above the EQ button). Having the power related status light above the "M" (Mode Switching button) instead of above the POWER button is confusing. Also, the TWS light location/function is not shown in the figures section of the manual - but TWS operation is described in the text.Use Issue (Red CHARGE Light Stays ON): **UPDATE**My Red CHARGE light never goes off (on one of my two speakers) after a full charge. The manual says its supposed to go OFF at charge completion (supposedly after 4 hours). It also states in manual that you should ensure you use a 2Amp supply/charger (not a smaller 1Amp supply) when charging. I am using a USB meter on my "suspect" speaker battery to track the charging volts/amps - and I'm finding that the final resting charge current is not dropping down as far on the suspect unit when compared to the charging values on the working unit. I believe that I may just have an out of spec battery in this particular suspect unit. I noticed some other reviewers on Amazon have indicated the same Red Light off issue, but I have not noticed as battery performance issues even with this light anomaly.**UPDATE** So...I have several in-wall receptacle USB power supplies and some external (brick) USB power supplies. All are 2Amp or higher output. For kicks, I took out my USB volt/current meter and checked ALL of the USB power supply output (V) voltages (with the speaker plugged in and charging). What I found was that the output voltage was not exactly the same across vendors (most were around 5.0V regulated but some went as high as 5.2V regulated - with newer units providing the higher voltage). What was interesting is that the RED Charge light FINALLY went out (i.e., charge completed) ONLY on the power supplies that were outputting above 5.10V (meaning this particular speaker charge profile/battery is very sensitive to the source power supply output voltage). You'd think the design should be such that it should work/complete charge with anything close to 5.0V/2A - but this was NOT the case for me. So...if you're having issues where the speaker NEVER completes the charge cycle (i.e., light stays on). Then I'd suggest you try finding/using a USB power supply that leans towards the HIGHER side of 5V voltage output. Again, I may have a battery that is slightly out of spec, but other purchasers have mentioned/reported the same RED light issue. So hopefully the designers look at this data for potential improvement. Good Luck.Overall Summary:Excellent for the price!! Good sounding/loud speaker for its size. I really like the TWS mode.

Product is a great buy for the money, i bought 2 as they can be linked together, one sounds great on its own, i primarily use them together as a mini stereo sound bar for my computer gaming and music, and they work great, can be used plugged into the pc via usb, or bluetoothed, its a bit of a pain to get both working in synch bluetooth you often need to do a reset by powering both off, turning one on at a time, holding M down to reset the settings, then turn them both off again and on one at a time and holding power down for 2 seconds then the same for the other right away and re connecting the 2 then re adding via bluetooth you have to pick the right one or only one speaker works its tricky but does work well once you choose the right speaker to add, you also need to remove any bogasing devices from bluetooth connected devices prior to all this on the pc too. Hope it helps and if you are considering a big name speaker over these dont, buy 2 of these and youll still have 100 bucks left in the bank....they float too with the speakers always facing up too which is a nice feature as well. Thats all for now, cheers!

Buscaba algo compacto pero con calidad de sonido y si cubre mis necesidades, super práctico su tamaño y bonito diseño y para su precio, excelente‼️👍👍. Muy recomendable🎼🎼

Super qualité de son (et mon homme est difficile 😅) facile à utiliser et à connecter. Très bon achat, on recommande!

Der Bogasing BT M4 ist sein Geld allemal wert.40 W, 3 EQ Modi am Gerät, gute Bässe, TF Karten Slot......was will man mehr! Kaufempfehlung 👍