Anker Soundcore K20i wireless ear waterproof to 36 hours of app technical standards Black (Bluetooth 5.3) [Completely earphones/inner earphones/IPX5

We offer a wide variety of products, and the following precautions apply to some of them. Please note that they are listed for all products. 【Voltage Compatibility】Designed for Japanese voltage (90-110V). Using with a different voltage may cause malfunction. 【Plug Type】Japanese plugs (A or B type). Use a conversion adapter if needed. 【Transformers & Adapters】Transformers adjust voltage; adapters only change plug shape. Using an adapter without a transformer may damage the product. 【Liability】We are not responsible for damages caused by improper use, such as using the product without a transformer. Long playback time of up to 36 hours: When the earphones are fully charged, you can play music for up to 6 hours, and when used with the charging case, you can play music for up to 36 hours. It also supports short-time charging, which allows approximately 2 hours of playback with just 10 minutes of charging. Comfortable in-ear design: Light weight of about 3.3g per ear and inner-ear design without ear tips. You won't get tired even if you use it for a long time, and you can use it comfortably even in long-term use situations such as online meetings and classes. Powerful bass even with in-ear headphones: 13mm drivers and Anker's proprietary BassUp technology deliver deep bass. Clear voice calls: Equipped with AI noise reduction function. Eliminates surrounding noise and delivers clear audio to the other party. Package contents: Main unit, charging case, USB-C & USB-A cable, safety manual & quick start guide, technical compliance mark certified product (frequency band: 2.40-2.48GHz) Anker Soundcore K20i (Bluetooth 5.3) [Completely wireless earphones / Inner ear earphones / IPX5 waterproof standard / Up to 36 hours of playback / Compatible with dedicated app / PSE technical standards compliant]