Description:The Bluetooth-compatible5.1 intelligent chip allows for stable, quick and non-delayed transmission.The earphone has sensitive microphone, which can bring you pure and clear calling experience.Made of ABS material, the wireless earphone is eco-friendly, lightweight and durable to use. The cool breathing light can enrich your using experience.The length of the earphone charging box is 9cm and width is 3cm.The Bluetooth-compatible earphone is suitable for doing sports, hands-free calling, listening to music and so on.Item Name: Bluetooth-compatible EarphoneMaterial: ABSModel: 312Bluetooth-compatible Version: 5.1Transmission Distance: 10mSupport Protocol: APD, AVRCP, HSP, HFPSpeaker Diameter: 8mmImpedance: 32Sensitivity: 42dBCharging Box Battery Capacity: 400mAh(Included)Earphone Battery Capacity: 40mAh(Included)Use Time: about 3-4HEarphone Charging Time: about 45MinsCharging Box Charging Time: about 90MinsFeatures: Sensitive, High Fidelity, Touch ControlSize Details: 9cm x 3cm/3.54" x 1.18" (Approx.)Notes:Due to the light and the screen setting difference, the item's color may slightly differs from the pictures.Please allow slight dimension difference due to the manual measurement.Package Includes:2 x Bluetooth-compatible Earphones1 x Charging Box 1 x Charging Cable