Features: brand new and high quality Bluetooth-compatible provides instant pairing and stable transmission without interruptions. for most brand bluetooth-compatible devices. Hang neck type earphone and easy to carry. Ergonomic design,fits the neck and shoulder, even worn for a long for time, it will not compress the neck and shoulders. It can also bring a pleasant and comfortable music experience during exercise. Smooth skin-friendly silicone can adjust the curvature at any for time, making it more comfortable to wear. Specifications: Material:ABS Color:Black,Blue,Green,Light Blue,Pink,White(Optional) Bluetooth-compatible Version: V 5.1 Operating range: About 33 feet (10 meters accessibility) Headset Battery Capacity: 200mAh Charging Jack:Micro USB; Frequency Range:20Hz-20KHz Power: 5V/0.5-1.0A Charging Time:About 2hours Calling for Time About 8hours Sensitivity:-42±3dB Horn:10mm 16Ω Support TF Card for Play Package Includes: 1x Bluetooth-compatible Earphone 1x Charging Cable note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.