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Brand Name: Cohai Vocalism Principle: Dynamic Control Button: Yes Active Noise-Cancellation: Yes Communication: Wireless Volume Control: Yes Style: Earbuds Sensitivity: 102±3dBdB Wireless Type: Bluetooth Is wireless: Yes Max Output: 0mW Line Length: 0.6mm Support APP: Yes Function: Common Headphone Function: For Mobile Phone Function: Sport Number Of Drivers: 2 Plug Type: Line Type Package List: User Manual Package List: Charging Cable Impedance Range: up to 32 Ω Connectors: None Model Number: Wireless buletooth earphone Earcups Type: Sealed Headphone Pads Material: Other Bluetooth Version: 4.2 Codecs: AAC Support Memory Card: No Driver Diameter: 20mm Resistance: 32ΩΩ Waterproof: Yes Frequency Response Range: 20 - 22000Hz Total Harmonic Distortion: 0% With Microphone: Yes Features: With Microphone Charging Method: CABLE Magnet Type: Other Included:1pc Earphones