QAZ B08SR88NFT Wired Headphone

Product parameters: Distortion degree: 0.5% Bluetooth standard: Bluetooth 4.1+EDR Power supply: built-in lithium battery 190mAh When charging: 3 hours (please extend the charging time for the first charge) Effective distance: 10 meters Function: call function, support music, multi-point connection Channel: stereo Single or dual ear: bilateral stereo Speaker specifications: 30mm Frequency response: 200Hz-2000Hz Sensitivity: 120db±3db Signal to noise ratio: ≥90DB Working time: more than 9 hours Standby time: 250 hours Charging port: USB packing list: 1*headphone 1*Instruction manual 1*audio cable 1*USB charging cable