Bluetooth Headphones Business CSR Bluetooth Headset Wireless Black Stereo Earphone Hands-free Noise Reduction HeadphoneWith Microphone: Yes Plug Type: Wireless Model Number: V09 Function: For Mobile Phone,Sport Wireless Type: Bluetooth Support Apt x: No Connectors: None Waterproof: No Communication: Wireless Active Noise Cancellation: Yes Support Memory Card: No Resistance: 16 Volume Control: Yes Control Button: No Vocalism Principle: Hybrid technology Is wireless: Yes Sensitivity: 1105dB Support APP: No Frequency Response Range: 20 24000Hz Style: Ear Hook Line