Headphone type: Bone conduction, open listening. Bluetooth version: 5.0 Battery life: Up to 6 hours Water and sweat resistance: IP55 Microphone: Dual microphones with noise cancellation for calls Weight: 29 grams (1.06 oz) Frequency response: 20 Hz - 20 kHz Impedance: 8 ohms Manufacturer: Shokz (formerly AfterShokz)