Features: in-ear stereo headphones, beautiful sound effects. Bluetooth 5.2 chip, fast Bluetooth connection, more stable transmission, easier connection, and listen to songs more smoothly.Design: The halter neck design is ergonomic, non-restrictive, comfortable and lightweight, suitable for all-day wear. Low-profile and Simp-le, it easily adapts to your style.Perfect Sound Effect: Provides balanced and natural sound, allowing you to enjoy dialogue and music without audio loss and interruption.Buttons: powerful functions like switch, ANSWER-calls, play and pause.Applicable occasions: charge for 2 hour, work for 7 hours. Sports, fitness, going out, travel, leisure, work and other places.Size：15x14cm/5.90x5.51inchDetails: Principle of vocal music: moving coilBattery capacity: 130mAhCharging voltage and current: DV5v, 80mAFiber transfer distance: 10MMusic time: about 7 hoursMusic time: about 7 hoursTalk time: about 7 hoursStandby time: about 120 hoursCharging time: about 2 hoursSound style: BassSensitivity: 110dBImpedance: 16QHorn size: 10mmFrequency response range: 50-20khz1 x HeadphonesA pair of earmuffs1x Charging line