Earbuds Liberate Air True wireless are made from sustainable materials such as bamboo, recycled silicone and fabric. Earbuds have a 9-hour battery life, with an additional 32 hours of charging in their case. Designed for active lifestyles with water and sweat resistant materials, they are the perfect companion on a hike or bike ride. They also feature sensor-activated touch control technology for easy use during any activity.Colour: BlackOriginal Colour by Producer: Signature BlackWeight (g): 72.0Frequency Range: 20 Hz - 20 kHzImpedance: 16 OhmSensitivity: 103 dBCharging Time (Hours): 2.0Play Time (hours): 9.0Type: True Wireless In-EarMade in: ChinaBattery Operation: YesType-A Connector: USB CConstruction Method: ClosedActive noise cancellation: NoMicrophone: Yes.