Name: Bone conduction earphone; Bluetooth-compatible version: V5.1 version; Patent No.: 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: 15 x 4 x 0.7CM; Bare metal weight: 18 grams; The size of the whole set: 17.5 x 9.6 x 1.8CM; Weight: 50G;Packing list: 1 x bone conduction earphone, 1 x charging cable, 1 x packing boxNote: Due to manual measurement, please allow 1-3 cm error, thank you. Due to screen and other objective reasons, there may be a certain color difference, please understand. <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>

Ks19 Wireless Headphones Tws Bluetooth Bone Conduction Hanging Neck Handsfree Headset With Microphone black