I am an Chinese seller,providing customers with high-quality and low-cost products. The types of products we sell include Home & Kitchen,Health & Beauty,Fashion Clothing,Electronics,Watches & Jewelry,and so on. We keep up with the most popular fashion trends. If you like our products, please follow us and become our followers and fans. Sincerely at your service .Please feel free to contact us if you have any questions.Description:Our product adopts bone conduction technology so you don't need to insert the earphone into your ears to avoid damaging your eardrum and protect hearing.It has powerful functions like built-in 8G memory, ergonomic design, high-definition-compatible call, three-tone balanced, high reduction, low distortion, professional tuning, lossless original sound quality, dual noise reduction, hearing aid engine, etc.It is made of good quality ABS material, durable to use. Magnetic charging has over-voltage protection, temperature control protection. Long-lasting battery life can listen to music continuously for 8 hours.The length of this product is 15.8cm, the width is 10cm and the height is 3.5cm. Open design allows you pay attention to outside sounds when listen to music, so, running is safer.With professional IPX8 deep waterproof design, it is suitable for swimming, diving, other sports, etc. Simple stylish earphone is light and comfortable to wear.Item Name: Bone Conduction EarphoneMaterial: ABSModel: B21Color: BlackBluetooth-compatible Version: 5.0Transmission Distance: 10 Meters (Barrier-free)Bluetooth-compatible Chip: ATS2825CSupport Protocol: A2DP V1.3, AVRCP V1.5, HFP V1.6, HSP V1.2Audio Format: WMA, FLAC, MP3 Working Frequency: 20HZ-20KHZBattery Capacity: 200mAh (Included)Standby Time: 120 HoursCharging Time: 1.5 HoursMusic Time: 8 HoursTalk Time: 10 HoursWaterproof Rating: IPX8 Professional Deep WaterproofCharging Port: MagneticHeadphone Type: Bone ConductionMemory Capacity: 8G (Included)Features: Bone Conduction, Long Standby Time, IPX8 WaterproofSize Details: 15.8cm x 10cm x 3.5cm/6.22" x 3.94" x 1.38" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bone Conduction Earphone1 x Charging Cable1 x User Manual a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a