Original Lenovo Bluetooth Headset 9D Stereo Waterproof Bluetooth Wireless Headset with Microphone Headset for Noise Reduction Function: [Low delay] Bluetooth chip 5.3 Enables fast and stable connectivity. Games are no longer just wired headphones. [Comfortable] Designed for ears. Make it comfortable and durable. [Waterproof] The IPX5 certificate eliminates your concerns about the use during rain and extreme sports. [Extended playback time] The improved battery capacity provides the charging box with more than 48 hours of waiting time and 10 hours of playback time. [Quick pairing] After configuration, when you take the headset out of the charging box, you will automatically connect the device. It's simple enough1