Neoteck Portable 3.5mm Headphone Amplifier with Bluetooth 5.0 Receiver, Two-Stage Gain Switch, 16-300 Ohm HiFi Earphone Amp, Aluminum Matte Surface

I dont have an intercom in my helmet. I have a nice pair of JBL speakers. This connects to my phone via Bluetooth. I drop it in my riding jacket pocket. It boosts the volume without distortion so that even at 80mph down the highway the sound is awesome.

Arrived quick. Easy to install. Works wonderfully. My music is clearer than anything I've listened to before. Love it.

Sounds great but the battery didn’t last as long as would have liked it to.

This thing is awesome! I use it to pair an iPhone 14 to an older Sole treadmill with built in speakers. Sound quality is excellent and plenty of volume, if you want it. Highly recommended!

Pros:SERIOUS volume boost, clean/clear balanced sound amplification that is more than loud enough & I seriously mean loud enough, probably to loud/powerful for a wide range of earphones, earbuds, headphones & IEM's, compact enough to be portable & pocket friendly, tactile volume control, can be "hardwired" as well as Bluetooth ability. Bluetooth pairing is simple, easy & stable within 20ft, almost 30ft with no obstructions, 2 stage gain switch is definitely noticeable when switched from L to H, very lightweight, easy to use. Decent battery life. Metal shell. Good build quality.Cons:This an amp without a DAC, no play/pause or track control, charges micro USB not Type-C which is a subjective con on my part, many ppl won't even care & have at least 40 spare micro USB cables these days..., might be too big,/not compact enough for some. Battery life: should be better/longer; considering the size of device. In my opinion it should have a bigger battery... should be closer to 24hrs or more not the 8hrs in the description. Bluetooth range could be better & should be considering it's big enough to accommodate a bigger/stronger Bluetooth antenna..bluetooth signal starts to breakup after 20ish feet & can also be disrupted entirely if objects are in the way of signal (ie: walls, more than 1)Would I suggest or recommend this device to others looking for a Bluetooth headset amp?Overall, Yes. Definitely.Bottom line; if all you're looking for is "more power/higher volumes" to your audio headgear.. You've found it. To that end it preforms Fantasticly...it can easily get more than loud enough to give the user an urge to want to turn it down a bit.I don't see a person needing to deal with Bluetooth signal issues all too much when considering it will most likely be worn "on person" with a wired headset via phone or mp3 player with or without Bluetooth & not used at a distance.The sound quality is balanced, full, rich & lively. It amplifies the sound given to it. That said it's up to the device the signal is originally coming from to "filter" or clean up the signal. Highs are clear, crisp, technical & articulate. Bass is super solid & not "muddy" drowning out mids or highs. Mid-range is smooth & rich. Vocals are forward/front center. Staging is more detailed & wide when being used with higher quality headphones/IEM's.The device is very lightweight & compact enough to not be noticeable on your person unless you don't have pocket(s) that can accommodate. Volume control is user friendly & simple unlike a button (that's purely subjective on my part. I prefer a knob over a button)Take note that this amp potentially has enough power to actually burn out/"fry" cheap earbuds & headphones. If you're looking for something with more features than just volume control or want to use at a distance.. this might not be for you.

The unit is now making a clicking sound on the left channel. I can hear what sounds like a capacitor charging internally. Further, while the units bluetooth works when next to the computer, it cuts out when in the pocket and the playback will not resume unless I play/pause the cell phone. This does not happen on either of my other bluetooth devices, and I'm using a new phone with Android 11. I will send the unit back.-----------The unit itself is wonderful. Three flaws:1. The attached auxiliary cable is one of the best looking cables I've ever seen. It's unfortunate that it's of such poor internal construction that it can not be used. The other reviewer is simply right on this. I'm kind of disappointed they would just send me trash. Just throw it away and discount the unit if it can't be used.2. I wish however that the usb-c charging port had a DAC built into it. A USB DAC can be had for $5. This would add a ton of value and performance to this.3. It needs a lossless bluetooth codec. Please add support for aptX. Headphones with aptX codecs can be purchased for $30. I would like that ability in this receiver too.If they spent another $0.50 on this beautiful, but useless, 3.5mm cord; and, if the unit had a DAC and aptX we'd be talking about mid-ranger gear. If they added play/pause next/back buttons, you'd be talking about a $200 unit. So the guts of this would kill the market with another $10 of hardware. It's just a missed opportunity.