Ultralight ComfortWeighing only 7 grams per earbud, these ergonomically designed earphones offer exceptional comfort for extended wear during workouts and daily use. Advanced Bluetooth-compatible 5.4Experience uninterrupted music playback and calls with the latest Bluetooth-compatible 5.4 technology, ensuring a stable and reliable connection. IPX5 WaterproofProtected against sweat and light rain, these earphones are perfect for intense workouts and outdoor activities. Long-lasting BatteryEnjoy up to 8 hours of playtime on a single charge, with a total of 24 hours including the charging case for all-day entertainment. Enhanced Bass & AI Noise ReductionImmerse yourself in rich, powerful sound with enhanced bass, while AI-driven noise reduction technology ensures crystal-clear calls. Secure Fit DesignThe ear hook design ensures a stable and comfortable fit, making these earphones ideal for exercise and running. Specifications: Speaker size: 15*11mm Charging voltage: DC5V Total playback time: about 24 hours Audio frequency: 20Hz-20kHz Model: AirFit Pairing name: Langsdom AirFit Chip solution: Bluetrum 5656C2 Bluetooth-compatible protocol: HFP, A2DP, HID, AVRCP Bluetooth-compatible version: BT V5.4 Working distance: about 10 meters Battery type/capacity: Earbud: 08120 55mAh*2 lithium polymer battery with protection board Charging case: 403035 400mAh lithium polymer battery with protection board Earphone charging time: about 1 hour Net weight: about 60g Package included: 2 x Earphones 1 x Charging Case 1 x USB C Charging Cable 1 x English and Chinese User Manual 1 x Storage Bag Other items not include