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Ultrasone - SIRIUS Portable Bluetooth Adapter

EMI Starting from ₹ 893.

Buy Headphones on EMI

Go for an easy EMI scheme which allows you to pay for your orders over a convenient period. A minimum purchase value of Rs. 500 is required to avail the EMI facility and the facility can be availed for tenures of 3, 6, 9 or 12 months.

This payment method is currently only available for customers using credit cards issued by Kotak, Axis, ICICI, IndusInd, HDFC, HSBC, SBI, AMEX, RBL & STANC Banks.

After checking out, Select the "Credit Card / Debit Card / Net Banking / EMI" option, which will then direct you to the PayU Payment gateway. Select your card and check the installment value and the overall interest charged on the transaction. 

The interest rate charged varies from bank to bank. Here is a summary of the interest rates:

Bank Min Amount (INR) 3 Months 6 Months 9 Months 12 Months 18 Months 24 Months
KOTAK 500 12% 12% 14% 14% 15% 15%
AXIS 2500 12% 12% 13% 13% 15% 15%
ICICI 1500 13% 13% 13% 13% 15% 15%
INDUSIND 2000 13% 13% 13% 13% 15% 15%
HDFC 3000 13% 13% 14% 14% 15% 15%
HSBC 2000 12.50% 12.50% 13.50% 13.50% 13.50% -
SBI  2500
- -
- -

These are annualized interest rates charged on a monthly reducing balance, which means that the principal amount is reduced with every EMI and the interest is calculated on the outstanding balance.

No processing or convenience fees are charged on any EMI transactions.


  1. Minimum Order value for EMI eligibility varies from Bank to bank. 
  2. EMI purchases need to be made on a single credit card and cannot be split across multiple cards.
  3. EMI monthly schedules begin from the next card billing statement post the transaction date as determined by your bank.


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Ultrasone - SIRIUS Portable Bluetooth Adapter (Unboxed)

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7 Days Replacement

Yay! This item is eligible for replacement.

This product is eligible for a replacement if the return request is raised within 7 days of delivery, and ONLY in the unfortunate event that it is found to be defective. This policy is not applicable to customers who are not happy with the product.

Once the manufacturing defect has been confirmed by our inspection team, we will provide a replacement of the originally ordered product. In case of replacements not being available, you can choose another variant, full store credit or a full refund will be provided.

Read more

Confused? Don't be, when there's a Guru to guide the way.



    Wireless Sound Unleashed

    In the headphone market, Ultrasone Performance series has an excellent reputation. SIRIUS lead Ultrasone to innovative design to make the headphone wireless. With SIRIUS, we can make all the Performance series headphones into Bluetooth headphones by removing the cable and attaching the SIRIUS.                             

    Perfectly Matched for the Performance Series

    The SIRIUS is designed to fit the Performance series headphones exactly. It has a curved shape that nicely fits into the Performance 820, 840, 860 and 880 headphones seamlessly. You won't be able to tell that a SIRIUS module is docked onto the headphones. It has such a low weight that it doesn't add any bulk to your Ultrasone headphones. At just 12 grams your Performance headphones remain as comfortable to wear as ever.


    Undisputed Wireless Sound

    Using the  aptX® Bluetooth codec for the highest quality, lossless audio streaming, the SIRIUS is a no-compromise Bluetooth adaptor. All headphones in the Performance series can be converted into a set of premium Bluetooth headphones using SIRIUS. In case you want to use your cables instead, when Bluetooth devices are not around, you can simply go back to the wired transmission mode.

    Not just a Bluetooth Adapter, but an Amp too!

    We're serious, the Ultrasone SIRIUS is not just a Bluetooth adaptor. In its tiny housing, Ultrasone has managed to squeeze in a headphone amplifier. This amplifier's sole purpose is to give the Performance drivers the ultimate signal for an enthused listening session.


    Control your Music & Calls with the SIRIUS

    With three buttons for operations, the SIRIUS is intuitively designed. Two of them are for adjusting volume, while the third button can be used to play and pause playback. Surprisingly the SIRIUS also includes an integrated mic so that you can turn your Performance headphones into a headset. Now you use your Ultrasone headphones with your smartphone, tablet or even wireless communication while gaming. Continuously use the SIRIUS with your headphones for up to 12 hours.



  • Specifications


    Compatibility: Ultrasone Performance 820, 840,860

    Technology: Bluetooth 4.1, aptX

    Bluetooth Profile: HFP, A2DP, HSP, AVRCP

    Battery Lifetime: 8 to 12 Hours

    Standby:160 Hours

    Charging Time: 1 Hour

    Max. Bluetooth Transmission Distance: 20 m

    Buttons: Play/Pause, Volume

    Weight:12 g

  • In the Box

    1. Ultrasone Sirius

  • Warranty

    Don’t sweat it, This Ultrasone product is covered by a 5 Years manufacturer's warranty.
    Learn more

Customer Reviews

Based on 2 reviews
Stunning performance really pricey, crude looks - but fab

If you own an Ultrasone Pro series headphone, just absolutely do yourself a big favour and buy this.

1. Superb sound quality includes APTX support and even with my iphone with no APTX its impressively pristine and it goes way louder than ever needed
2. Perfect docking with Ultrasone Pro headphones
3. Great battery - impressed
4. Flawless pairing and streaming and no issues on distance for normal use whether phone is in pocket or many feet away
5. iPHones will show Battery level of the adapter on the device (have'nt checked on Android).

1. Looks like Plastic has just been discovered and its 1960. Crude buttons (but all buttons work fotunately). Fiddly buttons, crude machining
2. Properitary charging dongle - no micro USB type standard interface
3. Pricey!

All in all for something that clips under the headphones and with outstanding core performance. I'd buy it and force each of my friends who have the superb Ultrasone Pro series (I mean 820 here) to just not hold back due to the price and just press buy and let everything fade to music.

Still rating 4 as it just works and it sounds great!

Superb Sound

It has so far been a wonderful experience using the sirius with my ultrasone performance 840. There are so many things to love about the sound. My 840 just sounds effortless now. The bass has more weight to it. Also there are details aplenty. Overall I am enjoying the sound signature. The AptX support just makes it better and using it with my pixel 2 has been a pleasure. Along with the Forza metallo wireless and Sony MDR 1000x, the performance 840 with sirius is one of my recent favorites. The battery life is decent and nothing great about it. But the sound alone is worth it.