Product details of Xiaomi Mi Dual Driver In-Ear Earphones Hi-Res Audio Model: BRE01JY Dual dynamic + balanced armature drivers Detailed CD pattern,  additional brilliant texture to the metallic body Good sound quality withstands the test of time Over 7000 reliability test Tri-band equalization, sounds so beautiful and natural  45° angled in-ear design, ergonomically designed for comfort  Soft and comfortable ear buds Sits perfectly on the contours of your ear​​ Warranty Period: 3 Months What’s in the box 1 x Mi Dual Driver Earphones, 1x User Manual (w/ English Language)