Quick overview from the supplier:
Wireless Earphones A4tech B25, 10 mm driver, 32 Ohm, 102db, Bluettoth 5.2, 40/380 mAh,IPX4, White
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Bluetooth v5.2 Wireless Earphone
Hybrid Diaphragm Φ10 mm Speaker Unit
Wireless Transmission Independently
In-Ear ComfortFit Style
Transparent Case Cover
Water Resistant IPX4
Automatic Connects
Voice Assistant Support
Extended Playtime 20H + Speed Charge
USB Type-C Rechargeable
3 Pairs of Ear Sleeves Included (S/M/L)
Frequency Response 20 Hz - 20 kHz
Earphone Sensitivity 102 dB @ -10 dB
Mic. Sensitivity -42 dB @1 kHz
Earphone Impedance 32 ohm
Operation Distance 10 m
Earphone Battery Type Lithium Battery (40 mAh)
Charging Case Battery Type Lithium Battery (380 mAh)
Charging Power 5V=500mA
Earphone Charging Time ＜1.5H
Case Charging Time ＜1.5H
Music Playtime with Single Charge ≈5H
Weight 38 g
