Bluetooth 5.1 chip provides fast and stable connection, high clarity phone call and stereo sound effect. It is suitable for outdoor sports and fitness with the sweat-proof feature.Ergonomic design makes it comfortable to wear, which can perfectly fit your ear. You can take the mini earphone anywhere.Made of high quality ABS material, the earphone has durability.The length of the charging box is 11cm, width is 8cm and height is 4cm.It is suitable for phone, laptops, computers, etc.Item Name: Wireless EarphoneMaterial:ABSInput Voltage: 5VWaterproof Grade: IPX7Support Operating System: for Android, for iOSFrequency Range: 2402MHz-2480MHzBluetooth Protocol Support: HFP 1.7, HSP1.2, A2DP 1, AVRCP 1.6, SPP1.2, PBAP1.0Bluetooth Version: 5.1Bluetooth Transmission Distance: 10mMusic Time: 4-5 HoursTalk Time: 4-5 HoursCharging Compartment Battery Capacity: 2000mAh (Included)Earphone Battery Capacity: 50mAh (Included)Noise Reduction Version: CVC8.0Earphone Charging Time: 2 HoursSize:11cmx8cmx4cm/4.33inx3.15inx1.57inNotes: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 Pair of Wireless Earphones1 X Charging Cable1 X User Manual1 X Charging Box