#Does not apply to quick charging cables or quick charging adapters. (Chargeable products with QC marks cannot be used at all) [Stealth design & can be used for both left and right ears] The main unit weighs only 3g, and the earphones are small in size (1.8 x 1.6 x 1.2) cm, so they are small and easy to find. Difficult. Designed for both left and right ears, it can be worn comfortably. It's so comfortable that you'll forget you're wearing it, and it won't put any strain on you even if you use it for a long time. You can enjoy hands-free music while driving, commuting to school, work, and exercising. [Rechargeable storage case included & IPX5 waterproof] Comes with a 260mah charging case that not only prevents your Bluetooth earphones from being lost, but also allows you to charge them repeatedly at the same time. Earphones can be charged 3 times. Enjoy 3 hours of continuous music playback/5 hours of continuous talk, and 150 hours of standby time. You can use it with confidence without worrying about running out of electricity. The earphone charging case is palm-sized and can be placed in your pocket. IPX5 waterproof protection grade equivalent to Daily Waterproof and Sweatproof , protects your earphones from sweat, splashes, rain, etc. Ideal for active scenes such as sports and exercise. Enjoy comfortable listening even while exercising [Excellent Bluetooth 5.0 & Automatic Pairing] You can enjoy calls and music with clearer sound quality even wirelessly without getting tired. Experience an easy, fast and uninterrupted pairing connection. When you turn on the earphones, the earphones will automatically enter the Bluetooth pairing setting state. Connect to your smartphone and enjoy high-quality communication and music without waiting. When you restart the earphones, they will automatically connect to the last connected device. [One-button design & half-canal type] One-button design allows operation with one hand. All operations such as music playback/pause, next song, call start/end/rejection/redial etc. can be achieved with the on button. The half-canal type fits your ears and minimizes the burden on your ears, so you can wear them for long periods of time without feeling any strain, and you can use them while on the go without worrying about them falling off. [Compatibility & Quality Assurance] Compatible with all devices with Bluetooth function. For example: iPhone X/8/8 Plus/7/7 Plus, Samsung Galaxy. We carry out sufficient testing during production before shipping. If a quality problem occurs within 3 months of normal use, we will replace it with a new one for free. Please contact us through your order history through Amazon. How to contact: While logged in to Amazon, open the order history in your account service and click Contact Seller displayed on the right side of the relevant order. 1. Regarding charging failure: ① Soak a tissue paper in disinfectant ethanol and wipe the entire case and main unit. ②Please perform step 2 at least twice...