Most-complete Esonstyle S921 noise cancelling Bluetooth headset Specs

talk time
of weight
Bluetooth Version
Avg. rating:
(77%) (456 reviews over 3 sources)

The S921 is the only Esonstyle bluetooth headset we have on file.
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General Specifications
SpecialMagnetic earbuds
Weight (ounces)0.5 oz.
Weight (grams)15.5
Dimensions0.4 x 1.8 x 0.3
Dimensions mm10 x 45 x 7.5
Wearing stylesIn-ear
Main categoryNoise cancelling Bluetooth headset
Release year2016
Release month09

Audio Features
Noise cancellation systemCVC 6.0
Under The Hood
Frequency band2.402 to 2.480GHz
Stand-by Time1.6 weeks (Equivalent to 11.3 days or 180 hours)
Talk time4.5 hours (300 minutes)
Music Playback Time4.5 hours (270 minutes)
Battery voltage3.7 V
BatteryLithium polymer
Battery Power60mAh
Battery charging time120 minutes (4.75-5.25V charging voltage)
Bluetooth range33feet
Charging plugMicro USB
Physical Specs
Width (inches)1.8
Height (inches)0.4
Depth (inches)0.3
Width (mm)45
Height (mm)10
Depth (mm)7.5
Bluetooth Technology4.0 (Class 2)
Bluetooth Profiles SupportedAVRCP, HFP, HSP
Other Specs & Features
Multipoint (2 devices)
Available colorsBlack, Red, Green
Special Included AccessoriesCharging cable, Three pairs of silicone ear caps (small, medium, large), Silicone ear hooks, Cable clips
Control buttonsVolume up/down, Multifunction button


The S921 has CVC 6.0 noise cancellation and magnetic earbuds, but with a 60mAh battery (The average battery power for Bluetooth headsets is 120mAh), it is no surprise that the usage specs (5-hour talk time and 180-hour stand-by) of this model fail to keep up with those of most other models, as well.

Also called Esonstyle S-921.

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