Check the time, tune your guitar, keep the beat, and measure how loud you are with one device with the Soundbrenner Core 4-in-1 Music Tool in a Smartwatch Form Factor. It may look like a common smartwatch, but this device gives musicians a more specific way to keep time, thanks to a metronome that vibrates with the beat. Now the practicing musician can be free from the annoying clicks and chirps associated with most metronomes.

What's more, the Core can handle rhythmic accents as well as various time-signatures and subdivisions. You can tap the tempo to your exact requirements. Should you and four musicians need to play to the same beat, the Core lets you sync up to five devices.

The Core also offers a tuner suitable for guitar and basses. Snap the Core out of its magnetic seat, and affix it to your instrument by means of the included clip on attachment. You'll be able to tune your guitar or bass with ±1-cent accuracy. LED-guided tuning makes the process easy and quick.

Finally, if you need a decibel meter to make sure you're not too loud, the Core will also come in handy. The device can measure decibels between 70 to 110 dBa in 1 dB increments and can even send you alerts when things are too loud for too long.

Use the Core with a free companion app, use it with the world-renowned Metronome app, or just use it by itself. Also, don't forget to use it as a watch: it tells the time, displays the date, can set a timer, allows vibration alerts, and more. The Core is IP65 water-resistant, so you can take it out with you wherever you go, regardless of the weather outside. A wrist strap, a body strap, various strap rigs, a charging cable, the magnetic tuner mount, and a pair of earplugs are included.

Metronome, Tuner, and Decibel Meter    Wear on Wrist, Arm, Thigh, or Shoulder    Tell Time and Date, Set Timer and Alerts    Metronome via Vibration    Tune Instruments with Included Clip    Set Decibel Notification to Protect Ears    Syncs up to 5 Watches to Keep the Beat    Includes Wrist Strap and Body Strap    Includes Charging Cable and Tuner Mount    Includes Earplugs

• Vibration up to 7x stronger than smartphones
• Wearable on wrist, arm, ankle, thigh, chest, and shoulder
• IP65 water-resistant
• Fully functional watch with time, date, timer, vibration alerts, and metric/imperial measurements
• Tuner suitable for guitars and basses
• Contact tuning via included clip-on piezo attachment
• LED guided tuning
• Accurate to ±1 cent
• Tune between 25.6 and 416 Hz
• Vibrating metronome
• Tap tempo
• Customize time signatures, subdivisions, and accents
• Customize vibrations and LED lights
• Multiplayer sync up to 5 devices with one phone 
• Sync multiple phones over network using Ableton
• Usable with free companion app or standalone
• Decibel meter measuring 70 to 110 dBa via MEMS microphone

Related Questions and Answers

Q: 1. when will Sony NW-WS623 be available?

A: It is currently available and in stock.

Q: 2. Can I download library books on this device?

A: Yes you can. You will need to download the audio-books to the computer first, then drag-and-drop media file transfers from compatible Mac or Windows computers via USB.

Q: 3. warranty?

A: SONY Limited 1-Year Warranty

Q: 4. How loud are these compared to other Bluetooth headsets? Airpods?

A: Subjectively speaking, I would say they are not as loud nor do they sound as good as other ear-buds in the same price range. What you are gaining that those other earphones don't have is the ability to store music on the built-in hard drive and wear these to listen to music while swimming; no other ear bud does that.

Q: 5. This version comes with the ring remmote control?

A: Hi HUGO, No. NW-WS623 does not come with a remote commander. Check here for more details: https://helpguide.sony.net/dmp/nwws620/v1/en/contents/TP0001272039.html Regards, Vincent

Q: 6. Does Sony Walkman NW-E395 support USB OTG ( ON-THE-GO) functionality?

A: OTG is not supported.

Q: 7. Does this works for IOS devices? Iphones?

A: Joseph is correct. Otherwise, it is an excellent pair of wireless, bluetooth headphones.

Q: 8. Come with a charger?

A: Yes - comes with a USB cradle and short cable for charging/syncing with your laptop.

Q: 9. Can I upload music from spotify?

A: The Sony 8GB NW-E394 Series Walkman Digital Music Player (Black), BH # SONWE394B, will not upload DRM music files from Spotify.

Q: 10. Do both of the d-tap ports stay hot when you swap a battery? Or are they tied directly to one of the battery plates?

A: Yes they do.