Arrived as adThe new Sony WH-XB900N wireless headphones are an outstanding option for a comfortable listening experience at home, traveling or in a noisy office. They incorporate very effective noise suppression and echo canceling systems, have easy-to-operate controls and a very long battery life. Their quality is evident in every feature and they a part of the well-regarded Sony Extra Bass family.Here are the key features:• Sony WH-XB900N noise-canceling over-the-ear Bluetooth headphones• Ergonomic, fully adjustable over-ear, closed dynamic headphone• 40 mm dome driver for maximum bass and very accurate wide frequency response• Noise-canceling/suppression technology helps block external noises, may be switched on or off• Monitor function allows ambient sound to be easily heard while wearing headphones, may be switched on or off• Bluetooth 4.2 reception range up to 50 feet, NFC pairing connection option, support aptX codec• Built-in microphone for making and receiving phone calls• Touch control on side of right earphone to raise/lower volume, next/previous track selection• Power, Bluetooth pairing, Monitor and Noise Cancel buttons on left earphone• Rechargeable internal lithium ion power source: 6 hours to fully charge with included USB-C connection cable• Headphones will operate 30+ hours continuously from a full charge, 16 day standby time, customizable auto-off timer• Can also operate without using any power by connecting an included 4.1 foot 3.5 mm stereo cable to left earphone• 3.5 mm (headphone) male-to-male 50” connection cable included• 20 – 20,000 Hz audio frequency range, less than 1% THD distortion• Sony Headphone Connect app provides graphic equalizer and presets• Easy to follow illustrated quick set-up guide• Foldable design for compact storage• Size: 5.5 inches by 6.6 inches by 3.5 inches• Weight: 9 ounces• Soft pouch with drawstring closure included• One year warranty on parts and laborIncluded in the box are the headphones, instructions, a short USB-C charging cable, a 50 inch long 3.5 mm direct-connect wire cable and a nice soft pouch. The quick set-up guide is comprehensive with step-by-step instructions for using the headphones, a trouble-shooting checklist, technical specifications and detailed explanations for using each feature.The headphones have a non-reflective black finish, substantial bass-producing drivers and super-soft memory-foam cushions on each headphone for superb comfort and noise isolation. They fold flat to enable compact storage and to easily fit into a purse, drawers, etc. The Sony WH-XB900N has a look of quiet quality and business elegance without flashy excess.First step is to charge the headphones. Just attach the USB-C charging cable, plug it into your computer or a USB outlet and LED lights will go out when they are fully charged (which may take 4- 6 hours when fully discharged.) A red LED light next to the charging port goes out when the unit is fully charged. The stated music playing time of thirty hours seems conservative since I found the headphones would operate for nearly forty hours before fading out. The customizable auto-off feature aids this very long battery life.Next, press the power button to turn them on – an audio prompt indicates when the power is on or off. Pair the earphones with your phone or other source via Bluetooth or NFC. An audio prompt guides you, but my phone paired them very quickly and without drama. A blue LED indicates the connection has been made. The connection remained very solid throughout my home, up to nearly 50 feet.The headphones are fully adjustable and the very soft pads completely and comfortably enclose even the largest ears. The Sony WH-XB900N are the most comfortable headphones I have ever worn. They are light (9 ounces) and have plenty of adjustment range to enable a perfect fit. The earphone pads are fairly large (about 4 inches tall and 3 inches wide) so they qualify as “over ear” and they provide excellent sound isolation. You can wear them for many hours in perfect comfort and your ears will never complain.Even without the noise-canceling function most external sounds are blocked. Pressing the Custom (automatic noise canceling) button turns on that feature and there is an audio announcement that it is active (or that it has been turned off.) The ANC technology is very effective for mid-frequency noise. I turned on both my shower and bathroom sink faucet and the noise (which would normally be very loud) was just a faint hiss which I could easily ignore while listening to the music. Even without music playing the noise canceling feature was pretty effective. Further, you can adjust the degree of noise cancellation using the Headphone Connect app. These would be great on a noisy airplane ride!The Sony WH-XB900N headphones have a very accurate reproduction of music from bass through mid-range notes and on to the highest frequencies. You can modify the sound contour/response by utilizing the Sony Headphone Connect app which features a full equalizer, a number of surround sound presets and sound positioning controls. For those who like heavy bass these are an ideal choice. If you want to cut back the bass the equalizer on the app will do that very effectively. I played every range of music, from classical, blues, hard rock, jazz and a full range of vocals (opera through folk ballads) and these fine headphones never disappointed me. The sound quality is just beautiful.Sony has positioned these headphones to deliver premium sound and features at a mid-range price. Yes, you might find slightly better headphones but only if you are willing to spend at least 50% more, and even then most users would not really appreciate any difference in sound or features.Like all good earphones these will respond to various voice commands, allow you to interact with Siri, take calls, etc. Each earphone has some controls. The right side has a nice touch pad which will raise/lower volume, skip tracks (forward and backward), pause and repeat tracks and has a microphone for use during calls. The left side turns the earphones on/off, handles Bluetooth pairing, activates the noise cancelation feature and also takes calls. One very clever feature is Quick Attention which shuts off noise cancellation and lowers music volume when you touch the right headphone, enabling you to easily hear outside sounds (such as someone speaking to you), and then resumes noise cancellation and music volume when you remove your hand.Bottom line - the Sony WH-XB900N noise-canceling Bluetooth headphones are an excellent value for discerning music fans who want a very comfortable headset, superb noise isolation and beautiful sound reproduction. They are a perfect choice for traveling and would pass boring hours in airports and on planes with gold stars for quality, sound level and range. I am happy to award this fine product a full five stars and my full, unqualified endorsement. Buy these if you love music and want sweet isolation from the nasty noises of the world!vertised and highly recommended.