Bluedio M2 In-ear Wireless Bluetooth Headset Stereo Earphone Sport Headphones Music and Calls Headphone for Mobile Phones Black Colour

Color: black, white Bluetooth version: V4.1 Profiles: A2DP, AVRCP, HSP, HFP Drivers: 2*Φ0.56" Impedance: 2*16Ω SPL: 110 dB THD: <0.1% Frequency response: 20 Hz -20KHz Operating distance: up to 32ft (free space) Music/talk time: about 7 hours Standby time: about 160 hours Fully charged time: about 2 hours Cable length: 22.8" Package size: 7.87"-3.94"-1.85" Earbuds weight : 0.56 oz Package weight: 7.37 oz