iBall Decibel BT01 Review — Budget Headphone with SD Card & FM Radio

The Quick Verdict

The iBall Decibel BT01 is a budget wireless headphone that brings a unique combination of Bluetooth connectivity, SD card slot, FM radio, and Alexa built-in to the sub-₹1,500 segment. It is a "swiss army knife" audio device that does not rely solely on your phone for music — load MP3s on an SD card or tune into FM stations for phone-free listening. The Alexa integration adds smart assistant functionality, and the foldable design is travel-friendly. However, the sound quality is mediocre, the build quality is poor, the battery life is average, and the iBall brand lacks the service network of competitors. For users who want offline music playback and FM radio in a headphone, it is a functional novelty. For pure audio quality, competitors offer significantly better sound.

The Good

SD Card Slot for Offline Music — The standout feature — load MP3 files onto a microSD card (up to 32GB) and listen without your phone

For users who want music during workouts, travel, or areas with poor connectivity, this is genuinely useful.

Built-in FM Radio — Tune into local FM stations without needing your phone or internet

For news, sports commentary, or local music stations, the FM radio is a nostalgic and practical feature.

Alexa Built-in — Voice control for smart home devices, weather queries, timers, and more

The microphone picks up commands in quiet environments.

Foldable Design — The earcups fold flat for compact travel

The folding mechanism is functional and saves bag space.

Multiple Connectivity Options — Bluetooth, AUX, SD card, and FM radio — four ways to listen

If one method fails, you have backups.

Ultra-Low Price — At ₹999, this is one of the cheapest multi-function headphones available.

The Bad

Mediocre Sound Quality — The 40mm driver (estimated) delivers flat, uninspiring sound

Bass is weak, mids are muddy, and highs lack detail. Compared to the boAt Rockerz 430 or even the Zebronics Zeb-Duke, the Decibel sounds significantly worse.

Poor Build Quality — The plastic construction feels cheap and fragile

The headband is prone to cracking, the earcup cushions are thin and uncomfortable, and the buttons are mushy.

Average Battery Life — The claimed battery life is unclear, but user reports suggest 15–20 hours — significantly less than the Zeb-Duke's 60 hours or the Rockerz 430's 30 hours.

Micro-USB Charging — Dated charging port that requires carrying a separate cable

Most competitors at this price have moved to Type-C.

Bluetooth 5.0 Is Dated — Newer competitors offer Bluetooth 5.3 or 5.4

Connection stability, range, and power efficiency are worse than modern standards.

Alexa Requires Internet — The Alexa functionality only works when connected to your phone's internet via Bluetooth

It is not a standalone Alexa device.

FM Radio Reception Is Weak — The built-in antenna provides mediocre reception

In urban areas with tall buildings, stations fade in and out.

SD Card Navigation Is Clunky — Navigating through thousands of MP3s using headphone buttons is frustrating

There's no display, no playlist support, and no shuffle/random mode (on most variants).

iBall Brand and Support — iBall's brand presence in audio has declined

Service centers are limited, warranty claims can be challenging, and long-term support is uncertain.

No ANC or Gaming Features — Despite the "Decibel" name, there is no ANC, no gaming mode, and no low-latency feature.

Bottom Line

The iBall Decibel BT01 is a "features first, quality second" headphone that prioritizes novelty over audio fidelity. The SD card slot, FM radio, and Alexa integration are genuinely unique at this price, but the poor sound quality, cheap build, and average battery make it hard to recommend for serious listening. For users who want a swiss-army-knife audio device for casual use, it is a functional novelty. For music lovers, gamers, or commuters, the boAt Rockerz 430 at ₹1,199 or Zebronics Zeb-Duke at ₹999 offer significantly better value.

Rating: 2.25/5