Key Features Features Product Type Headphone Wearing Style Neckband Recommended Use Calls/Music Product Color Black Headset Type Binaural Cable Color Black Protection Feature Waterproof International Protection Class (IP Code) IP67 Ports and Interfaces Transmission Technology Wireless Bluetooth Yes Bluetooth Profiles A2DP, AVRCP, HFP, HSP Bluetooth Version 5.1 Wireless Range 10 m Headphone Position Headphone Speaker Bone? onduction Headphone frequency 20 - 20000 Hz Headphone sensitivity 105 dB Microphone type Built-in microphone sensitivity 38 dB Mic noise suppression Yes Battery/battery powered Yes Battery/battery type Built-in battery Battery/battery technology Lithium Polymer (LiPo) Battery/battery life 8 h Battery charge time 1.5 h Weight and dimensions Weight 26 g