Design
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.
- EarFun Free 2S ipx7
- Soundcore Liberty Air 2 Pro 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.
- EarFun Free 2S null
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- Soundcore Liberty Air 2 Pro 10.6g
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Has RGB lighting
RGB lighting allows you to choose between millions of colors and customize the look of your PC components.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
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.
- EarFun Free 2S null
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- Soundcore Liberty Air 2 Pro null
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Sound quality
Has active noise cancellation (ANC)
This type of device allows you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the volume to overcome background noise. Ideal for plane rides and morning commutes.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
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.
- EarFun Free 2S null
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- Soundcore Liberty Air 2 Pro 11mm
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Power
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.
- EarFun Free 2S 23
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- Soundcore Liberty Air 2 Pro 19h
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Battery life (ANC)
The battery life when using active noise cancellation (ANC), as given by the manufacturer.
- EarFun Free 2S null
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- Soundcore Liberty Air 2 Pro 2h
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Charge time
The time it takes to fully charge the battery.
- EarFun Free 2S 1.5
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- Soundcore Liberty Air 2 Pro 55mAh
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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.
- EarFun Free 2S 40
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- Soundcore Liberty Air 2 Pro null
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Has a solar power battery
A solar battery takes its energy from light, and stores it in a self-recharging battery which never needs to be changed.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
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.
- EarFun Free 2S 5.2
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- Soundcore Liberty Air 2 Pro 5
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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.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
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.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
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).
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
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).
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
Has aptX
aptX is a codec used for transmitting audio wirelessly with Bluetooth. It is developed by Qualcomm, and supports 16-bit audio at a bit rate of 384kbps.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
Has aptX Lossless
aptX Lossless is an audio codec for Bluetooth devices that is developed by Qualcomm. It supports high quality 16-bit/44.1kHz audio (at a maximum bit rate of 1200kbps). This codec provides CD-quality audio without any loss of data.
- EarFun Free 2S null
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- Soundcore Liberty Air 2 Pro null
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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.
- EarFun Free 2S 60
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- Soundcore Liberty Air 2 Pro 10m
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Maximum Bluetooth range
The device can connect at a greater distance via Bluetooth or infrared to another device.
- EarFun Free 2S 15
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- Soundcore Liberty Air 2 Pro 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.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
Can be used wirelessly
Wireless devices allow users more freedom of movement.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
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.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
Has in/on-ear detection
Sensors can detect when they are removed from your ears so that the music is paused, saving battery life.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
Has find earbuds feature
You can use the app to play a sound from your earbuds to help you locate them.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
Has a mute function
The device has an option to mute/unmute a conversation directly from the device.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
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.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
Has a temperature sensor
With a temperature sensor you can monitor changes in temperature to measure your exertion levels and avoid hyperthermia.
- EarFun Free 2S
- Soundcore Liberty Air 2 Pro
Microphone
Number of microphones
More microphones result in better sound quality and enable the device to filter out background noise.
- EarFun Free 2S 4
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- Soundcore Liberty Air 2 Pro 6
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