New Upgraded Tws Wireless Bluetooth Earphone With Popup Open Window Pair Automatically White

Support protocol: HSP/HFP/A2DP/AVRCP Audio decoding: AAC/SBC Communication range: less than or equal to 15m Frequency response: 20Hz-20KHz Speaker sensitivity: 119+/-3dB Distortion rate: less than or equal to 5% Drive unit: 13mm Impedance: 32 ohms Power: 3mW Charging box capacity: 320mAh Headphone battery capacity: 30mAh Music time: about 6 hours (volume 70%) Talk time: about 5 hours Connection standby time: about 120 hours Headphone charging time: about 1.5 hours Charging time of the box: about 2 hours Wireless charging time: about 3 hours Support charging headset: 4 times