Halter Neck Wireless Bluetooth Headphones Multi-Function Sports Earbuds In-Ear 5.0 Unisex Maximum Comfort Features: 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 , 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. Product Description: Size：15x14cm/5.90x5.51inch Principle of vocal music: moving coil Battery capacity: 130mAh Charging voltage and current: DV5v, 80mA Fiber transfer distance: 10M Music time: about 7 hours Talk time: about 7 hours Standby time: about 120 hours Charging time: about 2 hours Sound style: Bass Sensitivity: 110dB Impedance: 16Q Horn size: 10mm Frequency response range: 50-20khz Package includes: 1 x Headphones A pair of earmuffs 1x Charging line