Name: Bone Conduction Earphone Bluetooth-compatible version: V5.1 version Patent number: 202130669191.1 Product implementation standard: GB 8898-2011 Battery: 110MAH Talk time: about 8 hours Music time: about 8 hours Communication distance: about 10 meters Battery type: lithium polymer battery Supported protocols: HEP/HSP/A2D/AVRCP Frequency: 20Hz-20KHz Impedance: 32 ohms Sensitivity: 85dB/mW Waterproof grade: IPX 5 Speaker material: copper ring speaker 14.2mm Appearance material: ABS Bare metal size: 15x4x0.7CM Bare metal weight: 18 grams Complete set size: 17.5x9.6x1.8CM Weight: 50G Packing list: 1 x Bone Conduction Earphone 1 x Charging Cable 1 x Packing Box Note: 1. Due to manual measurement, please allow 1-3cm error. Make sure you don&#39;t mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks. <div class="panel panel-info"><div class="panel-heading" style="font-weight:bold;">IMPORT: THIS ITEM IS SHIPPED FROM CHINA. PLEASE EXPECT UP TO 25 DAYS FOR DELIVERY</div></div>

Ks-19 Bone Conduction Earphones Bluetooth Hanging Neck Headphones Sports Waterproof Earbud Black