Features: -Special Bone Conduction Design -With LED Indicator -Bluetrum Audio Processing HIFI Stereo Field, Bluetrum Bluetooth 5.2 -TPE Material, Skin-friendly, Non-irritating -Memory titanium alloy rear hanging design Support 360 degree bending Not easy to damage Not deformed -Large Bass Diaphragm, 3D NICAM, Shock Bass, Pure Voice -Lightweight, Zero Burden, Unrestrained -CVC Professional Noise Reduction Parameters: Bluetooth specification:5.2 Waterproof level:IPX5 Weight: 20g BT distance: 10-15M Speaker Type: Bone Conduction Technology Speaker Frequency:20Hz-20kHz Microphone Sensitivity:-42db BT Version: V5.0 Battery: 150mAh Lithium Polymer Battery maximum volume Play time8 hours Play time:20 hours80% volume) talk time: 17 hours Headphone charging time:30 min Standby Time: 12 days Package Included: 1Pair of Wireless Earbuds 1Charging Cable 1*User Manual