A4tech Bloody M30 Pure Bass True Wireless Earbuds -

Speaker Size: 10 mm Frequency Response: 20 Hz-20 kHz Earphone Sensitivity: 105 dB @ -10 dBFS Mic. Sensitivity: -42 dB @1 kHz/Pa Earphone Impedance: 32 ohm Bluetooth Version: v5.0 Operation Distance: 10 m Earphone Battery Type: Lithium Battery (40 mAh) Charging Case Battery Type: Lithium Battery (500 mAh) Charging Power: 5V=500 mA Earphone Charging Time: ＜1.5 H (Low Battery to Fully Charged) Case Charging Time:＜2 H (Low Battery to Fully Charged) Music Playtime with Single Charge: ≈4H (50% Volume Data) Playtime from Charging Case: ≈22H (50% Volume Data) Weight: Earphone: 9 g / Charging Case: 32 g Warranty: 180 Days Warranty