Through stereo enhancement technology, it brings a panoramic sense of envelopment, allowing you to listen to music, watch TV shows, and play games on any platform, helping you immerse yourself more Bluetooth 5.3 transmission, lower latency and more stable: enhances signal penetration, reduces sound quality loss and delay, provides full second response and stable online performance 13mm diaphragm unit, HIFI sound quality, and surging sound: it can analyze strong loud fields and present rich details of sound, with balanced low, medium, and high frequencies, making it feel like being in a music scene Dual channel delay technology, combined with Bluetooth 5.3 technology, achieves dual headphone delay as low as about 0.06 seconds Specification: Bluetooth version: V 5.3 Supporting protocols: HSP, HFP, A2DP, AVRCP Battery capacity: 35mAh (battery without protective board, headphone board with lithium protection IC) Charging case battery capacity: 230mAh (with protective plate) Charging time: 1.0H Call time: 4H Playtime: 5.5H Standby time: 200H Speaker unit: Φ 13mm Sensitivity: 104dB Impedance: 16 Ω Maximum transmission distance: 10M Voice prompt: supported Multipoint connection: not supported Wearing method: semi in ear style Instruction manual in both Chinese and English Interface: Type-C Waterproof level: IPX6 strong waterproof and sweat proof function (limited to headphones only, charging case not waterproof)