Soul Blade puts a real-time running coach and heart rate into smart earbuds

Truly wireless earbuds set to hit the crowdfunding trail in the coming months
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Soul Electronics is building on its impressive Run Free Pro Bio smart running headphones by bringing its real-time coaching skills to a pair of truly wireless earbuds.

The Soul Blade features the same BiomechEngine technology that's able to collect a host of running-specific metrics including cadence, symmetry, step length and balance. With that information it is able to offer advice in real time on your running technique.

Read this: Best hearables and smart earbuds to look out for

In addition to the advanced real-time coaching features, there's a heart rate monitor letting you better measure workout effort levels from your ears. We've have already seen in-ear HR monitors crop up in sports headphones from the likes of Jabra, Bose and Bragi.

The iOS and Android-friendly buds feature an IPX7 weatherproof design giving you added protection sweat and water. There's also a Transparent Audio Mode, so you don't block out all of that ambient noise when you're working out in areas that you need to be more aware of your surroundings.

Soul Electronics says you can expect 96 hours of total playtime with the accompanying charging case using USB-Type-C connection to unlock fast charging.

The Soul Blade buds are hitting Indiegogo in the next few months with Soul Electronics aiming to raise $1 million before making them available for anyone to pre-order.

We spent a fair amount of time with the Run Free Bio wired headphones and liked them enough to shortlist the hearable at last year's Wareable Tech Awards. So we have high hopes for these wireless earbuds that pack that same innovative tech with the added bonus of a heart rate monitor.

Soul Blade puts a real-time running coach and heart rate into smart earbuds

How we test

Michael Sawh


Michael Sawh has been covering the wearable tech industry since the very first Fitbit landed back in 2011. Previously the resident wearable tech expert at Trusted Reviews, he also marshaled the features section of

He also regularly contributed to T3 magazine when they needed someone to talk about fitness trackers, running watches, headphones, tablets, and phones.

Michael writes for GQ, Wired, Coach Mag, Metro, MSN, BBC Focus, Stuff, TechRadar and has made several appearances on the BBC Travel Show to talk all things tech. 

Michael is a lover of all things sports and fitness-tech related, clocking up over 15 marathons and has put in serious hours in the pool all in the name of testing every fitness wearable going. Expect to see him with a minimum of two wearables at any given time.

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