New KS19 Concept Bone Conduction Bluetooth Headset Wireless Ear-hook Type Non-in-ear Bluetooth Headset

KS-19 Bone Conduction Concept Bluetooth Headset Sound Conduction Air Conduction Non-in-ear Neck Hanging Neck Hanging Bluetooth version: V5.1 version Battery: 110MAH Talk time: Approximately 8 hours Music time: Approximately 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 Material for speaker: copper ring speaker 14.2mm Appearance material: ABS Bare metal size: 15 * 4 * 0.7CM Weight of bare metal: 18 grams Complete set size: 17.5 * 9.6 * 1.8CM