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

------------------------------------------------------------------------------------------------------------------ 【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating 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 approximately 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]