Superb build quality, excellent battery life, good sound,
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This review is from: Sennheiser MM 450 Wireless Bluetooth Stereo Headset (discontinued by manufacturer) (Electronics)
I've had these headphones for over 18 nonths now and I've been very pleased with them from day one.
In The Box: Sennheiser provide a USB cabe for charging (there is no mains charger provided) and a stereo cable, along with a small soft case in which to keep everything, and a CD instruction book. With the headphones comes a single, removable, rechargeable battery which, as with all rechargeable batteries, should be fully charged before first use.
Build Quality: After owning a pair of Bose headphones that simply disintegrated after two years of light use I was concerned about how these headphones would stand up to what has been very regular use (twice a day, 3-5 days a week) and I'm pleased to say that there is no visible wear and tear on any part of the headphones and they feel as solid now as they did on day one.
Set-Up: Charge the battery. Each battery has a small LED next to the charge socket; plug in a USB cable to your computer and the battery and the LED lights up red. Once fully charged, it changes to green. Now you're ready to go. Put the battery into the headset (you don't have to remove it for charging) and hold down the centre button on the right earpiece until it flashes alternately blue/red - you can now pair the headphones with a device. Once paired you're ready to go.
I've paired these headphones with my Mac, an iPad, and several different Android phones and tablets with no issues. The headset remembers the four most recently used devices, so if you have a lot of hardware you might find yourself re-pairing devices from time to time.
Controls: The headset has seven (count them!) buttons, all on the right earpiece. On the side are five buttons. The centre button is on/off (hold down for a long time) as well as play/pause for media and answer/hang up for hands free calling. Above and below the centre button are the volume up/down buttons, while those either side act as next/previous track. All work well, are easy to find by touch and there is no real lag between pressing a button and the connected device reacting.
One point: If you've not pressed any buttons for a while and want to pause playing media you'll need to press the pause button twice, just to show the headset you "really mean it".
The two remaining buttons are on the bottom of the right earpiece. The front one controls noise cancellation while the rear allows you to turn bluetooth off and on ("flight mode"). Both buttons light up once pressed and then go out after a short while. In flight mode you can use the supplied stereo cable to connect to your media device of choice to continue using the headset with noise cancellation. You can even use the headset with the cable when it is switched off (or has a flat battery) - but the microphones do not send audio when using the cable - so no calls.
In use the headphones are easy to use and light to wear at under 120g and provided you adjust the headband correctly will sit comfortably on your head. Both music and hands free calling work well, although taking a call outdoors can subject the caller to all the background noise around you. Battery life is very good. Sennheiser quote 10 hours of audio playback over bluetooth, reducing to 8 if you use noise cancellation and my experience backs this up. I bought a spare battery and this only gets used occasionally when commuting but more frequently when flying or on the train. I can't attest to the 20 hour talk time as I probably only take one or two calls a month through them.
Noise cancellation for me works well. However you must remember that on-ear headphones don't seal as effectively as "proper cans" so there is a limit to their effectiveness. Overall I've been left with an excellent impression of these headphones and would thoroughly recommend these and any similar Sennheiser headphones.