This is an Iitrust headset. ◎ Operation confirmed ◎ Slightly scratched (as shown in the circled areas in the photos) ◎ Bluetooth connection ◎ No instruction manual ◎ Headset and charging cable only Please refrain from purchasing if you are sensitive to used items. Thank you. --------------------------------------- Headset Bluetooth ・【Open-ear design that doesn't block the ears】 Similar design to the popular bone conduction earphones, these earphones don't block your ears, allowing you to clearly hear ambient sounds (car sounds, traffic signals, etc.). They also use silicone material, which significantly reduces the fatigue caused by long-term use of conventional single-ear earphones and headsets. ・【Microphone specialized for calls & ENC noise canceling】 Improves issues such as noise often found in conventional Bluetooth headsets, delivering clear voices to the other party. The voice delay rate is overwhelmingly lower than conventional single-ear headsets, and it cuts out surrounding noise remarkably well. The weakness of easily falling off has also been improved, making it ideal for web conferences, meetings, and various other situations. ・【Up to 11 hours of continuous use & Bluetooth 5.2】 Uses a 165mAh lithium polymer battery, allowing for up to 11 hours of continuous playback. The standby time is approximately 300 hours. Those who use it for online meetings don't have to worry about the power running out. It improves common problems with conventional Bluetooth headsets, such as unstable communication, power loss, fast battery drain, and interruptions. ・【Mute function & can connect to two devices simultaneously】 Equipped with a mute function, pressing the volume down button during a call will prevent your voice from being heard by the other party, effectively protecting your privacy. In addition, it can connect to two devices simultaneously, allowing you to connect both a work and personal smartphone at the same time. ---------------------------------------