Advanced Bluetooth 5.0 Technology: Bluetooth wireless headphones feature the most advanced Bluetooth 5.0 technology, delivering faster and more stable connections, more realistic sound and lower power consumption. The unique stereo design delivers high-quality sound, allowing you to enjoy high-quality wireless music anytime, anywhere. Quick charge and 30-hour charger carrying case : True wireless earbuds deliver over 5 hours of playtime on a single charge. Plus, the portable charging case provides an additional 25 hours of battery life for these headphones. Therefore, when the headphones and the charging box are fully charged, you can enjoy 24 hours of music a day, and the quick charge function allows the headphones to be charged for 15 minutes through the portable box and can be used for 2 hours. Instant pairing and hi-fi stereo: once the headphones are activated. For Android/IOS users, enter the Bluetooth function settings and search for the name of "F9". The headphones can be individually connected to different devices. Provides stereo stereo and a strong Bluetooth signal for your games, calls, music and podcasts. Superior Sound Quality. IPX7 Waterproof: The Bluetooth headset has IPX7 waterproof standard. You can wear Bluetooth headphones when exercising, and the headphones will not move. Sweat and water resistant, no more worries about sweat or raindrops. Enjoy music anytime, anywhere for a better wireless listening experience. One-button operation, comfortable to wear: After connection, one-button music control, answer or reject calls, truly wireless. With an ergonomic design, incredible comfort and consistent sound, it's easy to get into your ears. Immerse yourself in music. Product Description Advantage: 1. True wireless headphones deliver dynamic stereo, enjoy 3D wireless stereo. 2. Built-in microphone and earphones let you talk freely while driving. 3. You can easily share music with your friends by sharing other headphones. 4. The wireless headphones are compatible with all Bluetooth devices. Specification: Bluetooth Version: V5.0+EDR. Operating range: 10-15 meters without obstacle. Wireless frequency: 2.402-2.480 GHz Auxiliary Power: Level 2. Battery capacity: 45 mAh. Charging voltage: 5V. Charging time: about 1-2 hours. Use time: talk time 4-6 hours, music play time 5-6 hours.< /p> Standby time: 180-240 hours. Weight: about 5g. How to use? X button 1: play, pause, answer, hang up. Touch X 2: Previous song. Key X 3: Next song. 2S Key: SIRI. * Scope of delivery: 2 Bluetooth headphones. 1 charging box. 1x USB charging cable . 1 user manual