Description: HIFI sound quality: independent cavity, built-in high-fidelity full-range speakers. Dual microphone intelligent noise reduction processing, clearer sound quality. Bluetooth 5.1 chip: advanced Bluetooth 5.1 transmission technology, 12 meters transmission distance stable connection, no delay and continuous line. Ear-mounted wearing: Q-elastic skin-friendly silicone, no pain or fatigue after long-term wear, enjoy the pleasure of exercise. Open the cover and connect: automatic second connection. Adopt AUTO PAIRINGTM back-to-field communication matching technology to achieve fast pairing of smart Bluetooth devices. Wireless design: The left and right split true wireless design brings binaural synchronization of music and calls. Simple buttons, multi-function buttons, convenient and fast. Specification: Version: V5.1 Communication distance: ≤10m Speaker impedance: 13Ω±10% Headphone battery capacity: 120mAh Standby time: 400 hours Music playing time: 13-15 Hours Talk time: 13-15 hours Charging compartment battery capacity: 500mAh Headphone charging time: about 1.5 Hours Charging case charging time: about 1.5 hours Product weight: 76g Frequency band: 2.402GHz-2.480GHz Support Bluetooth: A2DP.AVRCP.HFP.HSP.EDR Size Chart: 10.5x5.8x2.5cm/4.13x2.28x0.98inch Package Includes: 1 Piece Headset