Design
Fit
The fit of the earbuds.
- Blaupunkt BTW20 earbud
- Fresh 'n Rebel Twins 2 in_ear
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.
- Blaupunkt BTW20 ipx5
- Fresh 'n Rebel Twins 2 ipx4
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.
- Blaupunkt BTW20 null
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- Fresh 'n Rebel Twins 2 8g
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Has a display
The device has an electronic display to present information to the user.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
Sound quality
Driver unit size
The driver unit is the component that produces sound in the device. Bigger drivers are more powerful and can produce better bass.
- Blaupunkt BTW20 10mm
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- Fresh 'n Rebel Twins 2 null
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Lowest frequency
The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.
- Blaupunkt BTW20 20Hz
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- Fresh 'n Rebel Twins 2 null
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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.
- Blaupunkt BTW20 20000Hz
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- Fresh 'n Rebel Twins 2 null
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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.
- Blaupunkt BTW20 6h
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- Fresh 'n Rebel Twins 2 4h
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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.
- Blaupunkt BTW20 24h
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- Fresh 'n Rebel Twins 2 16h
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Charge time
The time it takes to fully charge the battery.
- Blaupunkt BTW20 null
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- Fresh 'n Rebel Twins 2 1h
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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.
- Blaupunkt BTW20 40mAh
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- Fresh 'n Rebel Twins 2 null
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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.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
Connectivity
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.
- Blaupunkt BTW20 5
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- Fresh 'n Rebel Twins 2 null
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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.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
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.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
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).
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
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).
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
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.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
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.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
Has in/on-ear detection
Sensors can detect when they are removed from your ears so that the music is paused, saving battery life.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
Has find earbuds feature
You can use the app to play a sound from your earbuds to help you locate them.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
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.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
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.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
Has a temperature sensor
With a temperature sensor you can monitor changes in temperature to measure your exertion levels and avoid hyperthermia.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2
Microphone
Has a noise-canceling microphone
These microphones are designed to filter out background noise from the desired sound. Especially useful in noisy environments.
- Blaupunkt BTW20
- Fresh 'n Rebel Twins 2