. Bluetooth v5.2 Wireless Earphone Hybrid Diaphragm Φ10 mm Speaker Unit Wireless Transmission Independently Secure SportsFit Design Transparent Case Cover Water Resistant IPX4 Automatic Connects Voice Assistant Support Extended Playtime 22H + Speed Charge USB Type-C Rechargeable 3 Pairs of Ear Sleeves (S/M/L) & 2 Pairs of Ear WingTips (S/M) Included Frequency Response 20 Hz - 20 kHz Earphone Sensitivity 100 dB Mic. Sensitivity -42 dB Earphone Impedance 32 ohm Operation Distance 10 m Earphone Battery Type Lithium Battery (40 mAh) Charging Case Battery Type Lithium Battery (400 mAh) Charging Power 5V=500mA Earphone Charging Time ＜1.5H Case Charging Time ＜1.5H Music Playtime with Single Charge ≈5H Weight 41 g