QKZ CK8 HiFi In-ear Four Unit Sports Music Headphones (Gold) Filter-Adhesive Card Holders Working Temperature: -10 degree C

Working Temperature: -10 degree C to +70 degree C

USB Port USB*2

PIR wakeup

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QKZ CK8 HiFi In-ear Four Unit Sports Music Headphones (Gold) Filter-Adhesive Card Holders Working Temperature: -10 degree C1. Quad core HD resolution The two 8mm moving coil units of the horizontal structure , strong quad core HD resolution , present CD quality sound 2. Ergonomic design comfortable to wear all day Use the huge human ear model data to design the earphone shape to you a comfortable experience 3. New acoustic tuning Powerful to restore the rhythm of the world, the iconic QKZ tuning style, true to restore all kinds of rhythm 4. Easy to operate, easy to master