Compare Bowers Wilkins PI7 vs Huawei FreeBuds 4i vs OnePlus Buds Z
Connectivity
Ports
USB-C
USB-C
USB-C
Wireless Connectivity
Bluetooth
Bluetooth 5.2
Bluetooth 5.0
Wireless Range
10 m
Construction
Battery | Capacity
55 mAh Earbud + 215 mAh Charging Case
40 mAh (earbud) x2 + 450 mAh (charging box)
Cable
20cm USB-C cable
Carrying Case
Yes
Colors
White, Charcoal
Red, Ceramic White, Carbon Black
White / Steven Harrington Edition
Drivers
9.2mm Dynamic Drive + Balanced Armature
10 mm dynamic
10 mm dynamic
Form Factor
In-Ear, True Wireless Headphones, Earbuds
True Wireless Headphones
Headphone Type
Dynamic headphones
In-ear
Dynamic headphones
Microphone
4x mics for ANC + 2x mics for telephony
Yes
Dimensions
Size | Depth
23.9 mm
35.9 mm
Size | Height
37.5 mm
29.05 mm
Size | Width
21 mm
Weight
8 g
5.5 g
4.35 g
Function
Bluetooth Codecs
AptX Adaptive, aptX HD, aptX Low Latency, aptX Classic, AAC, SBC
Bluetooth Profiles
A2DP v1.3.1, AVRCP v1.6.1, HFP v1.7.1, HSP v1.2, BLE GATT
Fast Charging
2hrs with 15min charge
10 minutes for 4 hours of playback
10 mins for 3 hours
Noise Cancellation
Yes
Active
Sensor
Wear detection sensor
Weather Resistance
IP55
Performance
Battery Life
4hrs Bluetooth with ANC
7.5h ANC off / 10h ANC off / 22h w/ charging case
Up to 5 hours (music playback) / 3 hours (phone call) / Up to 20 hours music playback (w/ charging box)
Charging Time
80 mins
Frequency Response
10Hz ~ 20kHz
20Hz - 20kHz
Microphone Sensitivity
-38 dB ± 2dB
Sensitivity
97 dB ± 3dB
Total Harmonic Distortion
0.3% (1kHz/10mW)
Production
Debut
2021-04
2021
2020-10
Model Name
E502A
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