HUAWEI FreeBuds Pro 4 

Earphones: 29.1mm * 21.8mm * 23.7mm (height x width x depth)

Charging box: 46.9mm * 65.9mm * 24.5mm (height x width x depth)

Whole machine (including packaging): about 165g

Single earphone: about 5.8g

Charging box: about 47g

Waterproof and dustproof level: Earphones: support dust and water resistance (IP54)

1) Model: Earphones: T0022 Charging box: T0022C

2) Sound quality:

>Lossless sound quality: Support - needs to be used with HUAWEI Mate 70 series mobile phones and HUAWEI Mate X6 and other models, and can achieve up to 2.3 Mbps lossless sound quality when equipped with HarmonyOS 4.3 and above. The data comes from Huawei Laboratory. 2.3 Mbps transmission capability is HWA certified.

>Spatial audio: Supported - Huawei phones/tablets with HarmonyOS 3.0 and above must be compatible.

>Hi-Res: Supported

>HWA: Supports 2.3Mbps Lossless certification

>EQ sound effects: Supported

>Frequency response range: 14Hz-48KHz - frequency range data comes from Huawei laboratory, Bluetooth connection uses L2HC/LDAC high-definition codec.

>Sound unit: Dual unit: 11mm four-magnet dynamic unit + micro-flat tweeter

>Active noise reduction: Support, memory earplugs for deep noise reduction

>Transparent transmission: Support

>Microphone: Silicon microphone: 3 left earphones, 3 right earphones

>Bone conduction pickup microphone: 1 left earphone, 1 right earphone

>Call noise reduction: Support, two-way quiet call

>Star flash connection: Support

>Bluetooth version: Bluetooth 5.2

>Offline search: Support: Support network search,

>Dual device connection (not limited to system): Support

>HarmonyOS multi-device connection: Support-multi-device automatic switching requires the use of HarmonyOS 3 and above models of mobile phones or tablets.

>Low latency: Support

>Smart listening: Support-Huawei mobile phones/tablets that are compatible with EMUI 11.0 or HarmonyOS 2.0 and above.

>Voice assistant: Support voice and gesture wake-up, support control of headphones-Huawei mobile phones/tablets that are compatible with HarmonyOS NEXT and above.

>HD recording: Supported - requires Pura 70 series (except Pura 70), Mate 60 series, Mate70, Mate X5, Mate XT and Mate X6 devices.

>Wearing detection: Supported + Tap: Supported + Slide: Supported + Pinch: Supported

3) Charging method:

>Wired charging: USB-C + wireless charging: up to 5W

>Super fast charging: not supported

>Charging time

>Charging the earphones with the charging box: about 40 minutes

>Wired charging with an empty box: about 60 minutes

>Wireless charging with an empty box: about 150 minutes

4) Battery type

>Lithium-ion polymer battery

>Battery capacity

>Earphones: 55 mAh (minimum for a single earphone)

>Charging box: 510 mAh (minimum)

5) Battery life

>Sound quality first:

>Listening to music (noise reduction on): The earphones can be used for about 4.5 hours on a single charge, and about 22 hours with the charging box;

>Listening to music (noise reduction off): The earphones can be used for about 6.5 hours on a single charge, and about 30 hours with the charging box;

>Connection stability first:

>Listening to music (noise reduction on): The earphones can be used for about 5 hours on a single charge, and about 23 hours with the charging box;

>Listening to music (noise reduction off): The earphones can be used for about 7 hours on a single charge, and about 33 hours with the charging box;

>Voice call (noise reduction on): The earphones can be used for about 3.5 hours on a single charge, and about 18 hours with the charging box;

>Voice call (noise reduction off): The earphones can be used for about 4.5 hours on a single charge, and about 22 hours with the charging box

Packing list:
Headset × 1
Charging case × 1
Earplugs × 7 (silicone: L, M, S, XS; sponge: L, M, S; of which the silicone M size factory put on the headphones)
USB Type-C charging cable × 1