【Bone Conduction Technology】Experience clear, dynamic sound while maintaining awareness of your surroundings, perfect for running, cycling, and outdoor activities. 【IPX8 Waterproof】Withstand sweat and rain during intense workouts and outdoor sports with the highest level of water resistance. 【32GB Built-in Storage】Store thousands of songs directly on the headphones, compatible with MP3, WMA, WAV, APE, and FLAC audio formats. 【Durable Titanium Design】High-strength titanium alloy construction resists deformation from twisting and stretching, ensuring long-lasting shape retention and comfort. 【Magnetic Charging】Dedicated magnetic charging interface ensures fast, stable, and safe charging while preventing dust accumulation. 【Bluetooth-compatible 5.4】Latest Bluetooth-compatible technology for stable connectivity and improved energy efficiency. Specifications: Pairing name: Langsdom BE17 Chip solution: Bluetrum BT8922B Bluetooth-compatible protocol: HFP, HSP, AVRCP, A2DP Bluetooth-compatible decoding format: SBC/AAC Bluetooth-compatible version: Bluetooth-compatible V5.4 Frequency: 2.402GHz-2.480GHz Working distance: 10m Prompt tone: neutral prompt tone Built-in TF card capacity: 32G Bluetooth-compatible antenna mode: ceramic antenna Number of channels: stereo TF card memory expansion: 32G TF card compatible audio format: MP3-WMA-WAV-APE-FLAC Sensitivity (speaker unit): 86db±3dB Speaker category: bone conduction speaker (with vibrator) Speaker size: Ø16.3mm Charging interface: magnetic charging Battery type/capacity: polymer battery/200mAh Play time: about 10H (50% volume) Charging voltage: 5V Charging time: about 2h None weight: about 32g Waterproof level: IPX8