Overview: 1.Equipped with Bluetooth chip to ensure sound quality and the highest-fidelity of headset. 2. Portable storage box, easy to carry and good protection. Please note: this box has no power pack function. 3. Ultra light and comfortable design, ergonomic earplugs and earrings, even if worn for a long time, will not bring a heavy feeling. The 180-degree turning arm can adjust the angle and install the earphone on the right or left ear. 4. Compatible with mainstream smartphones such as iPhone, Samsung, Huawei, LG, HTC, Android, etc., working time up to 8 hours, standby time 240 hours, 1.5 hours fast charging, 10 meters / 30 feet range. Specification: Communication: Wireless Connectors: None Wireless Type: Bluetooth Vocalism Principle: Other Control Button: Yes Volume Control: Yes Active Noise-Cancellation:Yes Function:For iPod,For Mobile Phone,Common Headphone Plug Type: Wireless Sensitivity:95±3dB Frequency Response Range:20-24000Hz Line Length: None Resistance:16Ω Waterproof:No Model Number: NAIKU V9 Support Apt-x: No Support Memory Card: No Support APP: No Is wireless: Yes With Microphone: Yes Package Content: 1 x Earphone