Brand Sony
Category Truly Wireless
Bluetooth version Bluetooth 5.2
Surround sound Sony's 360 Reality Audio
Sony WF-1000XM4
Ratings
Editor's Rating
Fit & Comfort
Release notes

The Sony WF-1000XM4 was released in Jul, 2021 at the price of $279. It supports Bluetooth A2DP audio codecs: (AAC, LDAC, SBC).

The Sony WF-1000XM4 last up to Rated up to 8.00 hours between charge. A note that with ANC, LDAC and DSEE, the playtime is significanlty shorter, down to 3.5 hours. 

The Sony WF-1000XM4 has the MT2822SA Bluetooth Soc on board, which is believed custom Airoha AB1568 (Airoha is also owned by Mediatek)

Features and specifications
Specs and features
Weight
7.4 grams
Water-Resistant
IPX4
Transparency mode
Yes
Calls
3 microphones (2 for NC and 1 for voice call)
Noise-Cancelling (ANC)
Yes
Multipoint
Yes
Driver
ø6mm Dynamic Driver
Fast Charging
5 mins = 1 hour
Wireless Charging Case
Yes, Qi Wireless Charging
Personalized Sound
No
Heart Rate Tracking
Dynamic Head Tracking

Codecs

Name Bit Depth Sampling Rate Max Frequency Max Bitrate Audio latency
AAC 24 bit Between 8 kHz and 96 kHz 96.0 kHz 264 kbps ~ 100-400 ms
LDAC 24 bit 44.1 kHz, 48 kHz, 96 kHz 96.0 kHz 990 kbps ~ 200-400 ms
SBC 16 bit 16 kHz, 32 kHz, 44.1 kHz, 48 kHz 48.0 kHz 320 kbps ~ 200-300 ms