Features:-Special Bone Conduction Design-With LED Indicator-With Volume Control Button, Answer/Pause/Play Button-Bluetrum Audio Processing HIFI Stereo Field, Bluetrum Bluetooth 5.0-TPE Material, Skin-friendly, Non-irritating-Large Bass Diaphragm, 3D NICAM, Shock Bass, Pure Voice-Lightweight, Zero Burden, Unrestrained-CVC Professional Noise ReductionParameters:Model: K08JSize: 138mm*105mm*45mm（reference)Weight: 30gBT distance: 10-15MSpeaker Type: Bone Conduction Technology SpeakerBT Version: V5.1Battery: 145mAh Lithium Polymer BatteryPlay time: 8 hourstalk time: 10 hoursHeadphone charging time: 1.5 hourStandby Time: 10 daysCharging Interface: Micro USBPackage Included:1*Pair of Wireless Earbuds;1*Charging Cable;1*User Manual;