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oraimo Open Circlet Open-ear Headphones

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Charges 10-min, Play 3.5-hr

Truly Open-ear Comfort

HD Voice in Calls

Increased Situation Awareness

Ergonomic Earbuds

Open Circlet OPN-40D


Product Parameters:

BT Version: V5.0
Range: 10m
Battery Playtime: Up to 13-hrs playtime
Charge Input: Type-C

*oraimo Lab test result.
(Results are based on 70% volume. Battery life may vary depending on the volume, the playback source , the temperature, environmental interference, and the user's habits.)


Product Features:

Truly Open-ear Design-Free and Comfort
With nothing in or covering your ears, there is no bud jamming or pain even after a long period of use. Superior air conduction technology eliminates the discomfort of vibrations caused by bone- conductive drivers. Additionally, you will feel like there's nothing in your ears thanks to the softest, lightweight design of the skin-friendly silicone material.

Open to Full Transparency-Increased Situation Awareness
Open-ear design allows you to be aware of your surroundings for a safe and connected listening experience.

Open-ear Design for Health- Safe and Hygienic Touch
Open-ear design allows free airflow in and out of the ear cups, reducing the pressure applied to your ears by allowing sound waves to escape elsewhere. The open-ear nature, with nothing on or blocking your ear canal, is also better for hygiene.

Ergonomic & Secure Fit- All Day Motivated
Matte finish provides additional grip and reassurance that each earbud will stay in place no matter how much you move. OpenCirclet is resistant to twisting even under rugged conditions thanks to its silicone-coated memory wire.

HavyBass Technology- Better Sound, Better Bass

Powered by 16mm large dynamic drivers and advanced air conduction, OpenCirclet delivers high-quality acoustic precision and amazing immersive stereo sound. The HavyBass™ algorithm tunes and boosts the bass, enabling the woofer to be heard clearly at different volumes.

IPX5 Waterproof & Sweat Protection-No Fear, No Stopping
An IP55 rating makes it sweat and water resistant for worry free workouts in rugged conditions. No fear, no limits, no stopping.

16 Hours Battery Life-Quick Charge
16-hr Total playtime provides non-stop music experience.
oraimo OpenCirclet also features a 10-min Quick Charge for up to 3.5 hours of battery life.

2-mic ENC Noise Cancellation-HD Voice in Calls
Beamforming array and AI Deep Neural Network algorithm reduce the disruptive noise around the caller. Optimized air duct suppresses wind noise during outdoor workouts. Therefore, the people you are calling can hear your voice more clearly.

Low-latency Game Mode-Audio and Video Sync in Moment
Supported by Bluetooth 5.2 transmission technology, low audio latency creates an enjoyable viewing and gaming experience since the sound is always stable.

Pop-up Notification- Google Fast Pairing
Google Fast Pairing function supports automatic fast pairing with Pop-up notification between OpenCirclet and your Google devices. It is considered compatible with Android 6.0 or above. Your device must also support Google Play services.

On-the-Go Control

All Reviews


Overall Rating


(238 reviews)
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Feb 02, 2023

Great sound

Arrived on time comfortable fit great sound

Reviewed by Paepae Verified

Helpful? (0) (0)
Feb 02, 2023

Massive improvement on buds

Love’em. Wouldn’t go back to buds for exercise now. Comfortable. Decent battery life. Good sound quality.

Reviewed by arrygee Verified

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Feb 02, 2023

best headphone ever

Best Headphones for Gym / Running , sturdy well made product

Reviewed by TM Verified

Helpful? (0) (0)
Feb 02, 2023

Comfortable fit

I bought these to replace my Marathon headphones that kept breaking. These are more robust although they cost five times as much. Sound quality is impressive and they are great for cycling as you are not completely shielded from outside noise.

Reviewed by Laken Verified

Helpful? (0) (0)
Feb 02, 2023

Great for listening to music yet being aware!

These ear phones if you want to enjoy your music in the gym or on your bike whilst remaining aware of surrounding events, particularly critical when on your bike. Sound may not be quite what you would get from the latest in-ear devices, however the latest version of the soft ware in the Pro is very good. One size fits all and head band is high quality and sound bars are held firmly in place next to the ear. Pairing with my I-Phone was easy and instructions are straight forward. Battery life is good. I think that it will also work whilst skiing - though I haven't tried that. Great safe way to listen to you sounds whilst active.

Reviewed by Isaccc Verified

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Open Circlet Open-ear Headphones