【Ultralight Comfort】Weighing only 7 grams per earbud, these ergonomically designed earphones offer exceptional comfort for extended wear during workouts and daily use.【Advanced Bluetooth-compatible 5.4】Experience uninterrupted music playback and calls with the latest Bluetooth-compatible 5.4 technology, ensuring a stable and reliable connection.【IPX5 Waterproof】Protected against sweat and light rain, these earphones are perfect for intense workouts and outdoor activities.【Long-lasting Battery】Enjoy 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 Reduction】Immerse yourself in rich, powerful sound with enhanced bass, while AI-driven noise reduction technology ensures crystal-clear calls.【Secure Fit Design】The ear hook design ensures a stable and comfortable fit, making these earphones ideal for exercise and running.Specifications: Speaker size: Ф15*11mmCharging voltage: DC5VTotal playback time: about 24 hoursAudio frequency: 20Hz-20kHzModel: AirFitPairing name: Langsdom AirFitChip solution: Bluetrum 5656C2Bluetooth-compatible protocol: HFP, A2DP, HID, AVRCPBluetooth-compatible version: BT V5.4Working distance: about 10 metersBattery type/capacity:Earbud: 08120 55mAh*2 lithium polymer battery with protection boardCharging case: 403035 400mAh lithium polymer battery with protection boardEarphone charging time: about 1 hourNet weight: about 60gPackage 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