Feature:1. BONE CONDUCTION: Open ear bone conduction earphone, suitable for jogging, cycling, hiking, etc., providing the safest listening and playing music.2. GOOD PERFORMANCE: The earphone adopts V5.3 Bluetooth chip version, with stable signal, low standby power consumption, and better performance.3. EXCELLENT SOUND: Composite diaphragm and large dynamic acoustic technology to restore the high frequency brightness and fixed frequency richness of music.4. 180 DEGREE ROTATION: Built in rotatable shaft, this wireless earphone supports 180 degree rotation, and is compatible with both left and right ears.5. BATTERY AND LED: This earphone has LED power display, allows for real time viewing of remaining power, built in 200mAh battery for long usage time.Specification:Item Type: EarphoneMaterial: ABSBluetooth Version: V5.3Transmission Distance: Approx. 10-20 meter / 32.8-65.6ftHorn: Approx. 16mm / 0.63inImpedance: 32Charging Interface: Type CUsing Time: 20 HoursCharging Duration: 1.5HBattery Type: 200mAh Lithium Ion Battery (built in).Package List:1 x Earphone1 x Type C Charging Cable1 x User Manual