Boult Audio FLEX Review

A few months back, Boult Audio introduced its ‘Flex’ wireless on-the-ear headphones in the Indian market at Rs. 1,499. The most talked about point of the headphones is ‘Dual Mode’ which offers – wire and wireless listening.

Box contents

  • Headphone unit
  • User manual
  • micro USB cable for charging
  • 3.5 mm golden plated AUX cable
  • 1 Year Warranty card


Talking about the design, it looks average if not great but it does give a premium when held, with the colour combination of black, grey and light cream. The outer material of the headphone is a bit spongy and plastic with a small addition of metals on the sides. Swivel folding earcups make it easy to store your headphones in a suitcase, bag or the supplied carrying case while travelling.

The earcups are wrapped up in artificial leather, and the earpads in this headphone are stuffed with foam, which is pretty cosy. It’s worth mentioning that this headphone sits light on your ears with the right amount of pressure.

Talking about the buttons, the right cup has multifunctional buttons, that lets the users turn on/off, volume up/down and play/pause music tracks as well. The feedback from the button is good and easy to use as well. However, the touch control works only when it is in the wireless mode.

Along with the headset, you will also get a micro USB cable, and user manual. Moving on, the Boult Flex weighs around 170 grams and has IPX5 waterproof rating as well. Boult Audio features Bluetooth v4.2 and supports iOS, Android, Blackberry and all Bluetooth-enabled smartphones, laptops, PCs, tablets. To pair the device, just hold the power button for 5 seconds until the blue LED light starts flashing and pair it.

In the heart of the Flex lies the industry approved Qualcomm CSR8635 Bluetooth which produces a seamless and lossless wireless transmission for silky smooth calls.


In real-world usage, the sound quality and noise isolation of Boult Flex is pretty decent. The tonal balance is well maintained and provides in-depth audio with good and expressive details. It does overpower the mids slightly, but the overall audio is good without losing much detail. The vocal and treble sounds are also good at this price segment.


Talking about the battery, Boult claims that the headphone can go up to 8 hours with Bluetooth turned on. In fact, we did get closer to that, as I got around 6 to 7 house approx which is impressive.

At the price of Rs 1,499, Boult Flex is a good option considering good quality build, above average sound quality and of course good battery life. It is available from Flipkart for as low as Rs. 1,399.

Photography by Siraj