Compare Huawei FreeBuds 4 vs Bowers Wilkins PI7 vs Lenovo Smart Wireless Earbuds
Connectivity
Ports
USB-C
USB-C
USB-C
Wireless Connectivity
Bluetooth 5.2
Bluetooth
Bluetooth 5.2
Construction
Battery | Capacity
30 mAh Earbud + 410 mAh Charging Case
400 mAh
Cable
20cm USB-C cable
Carrying Case
Yes
Colors
Silver Frost, Ceramic White
White, Charcoal
Black, White
Drivers
14.3 mm dynamic
9.2mm Dynamic Drive + Balanced Armature
11mm dynamic drivers
Form Factor
In-Ear, True Wireless Headphones, Earbuds
In-ear, True wireless headphones
Headphone Type
In-ear
Dynamic headphones
Dynamic headphones
Microphone
Yes
4x mics for ANC + 2x mics for telephony
6x Microphones
Dimensions
Size | Depth
18.5 mm
47.7 mm / 1.88"
Size | Height
41.4 mm
56 mm / 2.2"
Size | Width
16.8 mm
28.4 mm / 1.12"
Weight
4.1 g
8 g
4.2 g / 0.009 lbs
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
Compatibility
IOS, Android 8, Windows
Fast Charging
15 min for 2.5 hours
2hrs with 15min charge
Noise Cancellation
Active
Yes
Active Noise Cancellation w/ 6 microphones
Sensor
Wear detection sensor
Weather Resistance
IPX4
IPX4
Performance
Battery Life
4h ANC off / 2.5h ANC on earbuds / 22h ANC off / 14h ANC off w/ charging case
4hrs Bluetooth with ANC
Play time 5.4h (ANC on) / 7h (ANC off) + 3x extra charges w/ Charging Case (28h total)
Charging Time
1h
Frequency Response
10Hz ~ 20kHz
Total Harmonic Distortion
0.3% (1kHz/10mW)
Production
Debut
2021
2021-04
2021-09-08 (Lenovo Tech World 2021)
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