Design
Fit
The fit of the earbuds.
- Fresh 'n Rebel Twins 2 in_ear
- Shokz OpenRun Air null
Ingress Protection (IP) rating
The first number of the IP rating refers to protection against dust, while the second number refers to protection against liquid. E.g. a first number of 6 denotes that it is completely dustproof, and a second number of 7 denotes that the device can withstand full immersion in water.
- Fresh 'n Rebel Twins 2 ipx4
- Shokz OpenRun Air ip67
Weight
We consider a lower weight better because lighter devices are more comfortable to carry. A lower weight is also an advantage for home appliances, as it makes transportation easier, and for many other types of products.
- Fresh 'n Rebel Twins 2 8g
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- Shokz OpenRun Air 26
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Has no wires or cables
True wireless devices have no cables connecting any part of the device together. This is an important distinction as some wireless earbuds have cables connecting the two earbuds together.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Wingtips included
These earbuds come with wingtips that can be attached for a more secure fit. Wingtips come in handy for sports and other physical activities. When used correctly, they prevent the earbuds from falling off.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Is dustproof and water-resistant
The device is dustproof and water-resistant. Water-resistant devices can resist the penetration of water, such as powerful water jets, but not being submerged into water.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has stereo speakers
Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Waterproof depth rating
The waterproof depth rating indicates how well the device is protected against water ingress and water pressure. Devices which can withstand more water pressure are better for swimming or diving.
- Fresh 'n Rebel Twins 2 null
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- Shokz OpenRun Air null
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Sound quality
Has passive noise reduction
The device sits tightly in place, creating an acoustic seal which reduces background noise and prevents your music from leaking out.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Lowest frequency
The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.
- Fresh 'n Rebel Twins 2 null
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- Shokz OpenRun Air 20
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Highest frequency
The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.
- Fresh 'n Rebel Twins 2 null
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- Shokz OpenRun Air 20000
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Power
Battery life
The device's battery life (when in use) as given by the manufacturer. With a longer battery life you have to charge the device less often.
- Fresh 'n Rebel Twins 2 4h
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- Shokz OpenRun Air 8
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Battery life of charging case
The battery life of the charging case as given by the manufacturer. A charging case with a longer battery life allows you to recharge your headphones on the go multiple times before having to recharge the case itself.
- Fresh 'n Rebel Twins 2 16h
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- Shokz OpenRun Air null
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Charge time
The time it takes to fully charge the battery.
- Fresh 'n Rebel Twins 2 1h
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- Shokz OpenRun Air null
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Battery power
Battery power, or battery capacity, represents the amount of electrical energy that a battery can store. More battery power can be an indication of longer battery life.
- Fresh 'n Rebel Twins 2 null
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- Shokz OpenRun Air 1.5
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Has wireless charging
It supports a wireless charging standard such as Qi. To charge the device, you simply put it down on a compatible charging pad.
- Fresh 'n Rebel Twins 2 null
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- Shokz OpenRun Air null
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Has a battery level indicator
An indicator shows you when the device has low battery.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has a rechargeable battery
The battery can be recharged and used over again.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Connectivity
Has USB Type-C
The USB Type-C features reversible plug orientation and cable direction.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Bluetooth version
Bluetooth is a wireless technology standard that allows data transfers between devices placed in close proximity, using short-wavelength, ultra-high frequency radio waves. Newer versions provide faster data transfers.
- Fresh 'n Rebel Twins 2 null
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- Shokz OpenRun Air 5.1
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Has LDAC
LDAC is a codec developed by Sony for Bluetooth audio. It is capable of a very high bitrate of 990kbps, which provides high resolution audio. It can also automatically adjust to a lower bitrate of 330kbps or 660kbps to increase stability.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has aptX Adaptive
aptx Adaptive is an audio codec for Bluetooth devices that is developed by Qualcomm. It has a variable bit rate (between 279kbps and 420kbps), which means it can adjust the bit rate for different scenarios, such as listening to HD audio or reducing interference from other devices.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has aptX Low Latency
aptX Low Latency is a codec developed by Qualcomm. It uses Bluetooth 5.0 technology to provide low latency audio (around 40ms), which is useful when you want to avoid audio lag (e.g. when playing games).
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has aptX HD
aptX HD is an audio codec for Bluetooth devices that is developed by Qualcomm. It supports high quality 24-bit audio (at a bit rate of 576kbps).
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Audio latency
Latency refers to the time it takes for the audio signal to be transmitted to your headphones/earbuds. Lower latency reduces audio lag, and is particularly important when playing games or watching videos.
- Fresh 'n Rebel Twins 2 null
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- Shokz OpenRun Air null
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Maximum Bluetooth range
The device can connect at a greater distance via Bluetooth or infrared to another device.
- Fresh 'n Rebel Twins 2 10m
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- Shokz OpenRun Air null
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Supports Bluetooth pairing using NFC
Device supports fast Bluetooth pairing using NFC so it can communicate with other devices over Bluetooth. You can fastly pair devices without entering a code by simply holding one device next to the device with which it is to be paired.
- Fresh 'n Rebel Twins 2 null
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- Shokz OpenRun Air 10
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Can be used wirelessly
Wireless devices allow users more freedom of movement.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has AAC
AAC is a codec that is used for Bluetooth audio. It supports 24-bit audio at 250kbps. Because it uses psychoacoustic modeling, it can provide better results than other codecs at a similar bit rate.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Features
Has ambient sound mode
Ambient sound mode uses microphones to pass through ambient noises so that they can still be heard. It’s useful when you want to listen to music but also be aware of what’s happening around you, for example when you’re jogging but still want to be able to hear traffic.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has in/on-ear detection
Sensors can detect when they are removed from your ears so that the music is paused, saving battery life.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has find earbuds feature
You can use the app to play a sound from your earbuds to help you locate them.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Supports fast charging
Fast charging technologies, like Qualcomm’s Quick Charge or MediaTek’s Pump Express, are used to reduce the time it takes to charge a device. For example, with Quick Charge 3.0, the battery can be charged to 50% in just 30 minutes.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Travel bag is included
The device comes with its own special case or pouch, which is useful for safe transportation.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has an in-line control panel
There is a control panel on the cable, so you can easily operate the device without having to interact with it.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Has a built-in camera remote control function
The device can control your smartphone’s camera remotely (without installing third-party apps), allowing you to take shots even if your phone isn't near you.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air
Microphone
Has a noise-canceling microphone
These microphones are designed to filter out background noise from the desired sound. Especially useful in noisy environments.
- Fresh 'n Rebel Twins 2
- Shokz OpenRun Air