This is an Iitrust headset. ◎ Tested and working ◎ Slightly scratched (see circled areas in the photos) ◎ Bluetooth connection ◎ No instruction manual ◎ Headset and charging cable only This is a used item, so please refrain from purchasing if you are concerned about minor imperfections. Thank you. --------------------------------------- Headset Bluetooth ・【Open-ear design that doesn't block your ears】 Similar design to 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, significantly reducing the fatigue associated with prolonged use of traditional single-ear earphones/headsets. ・【Microphone specialized for calls & ENC noise cancellation】 Improves issues like noise often found in conventional Bluetooth headsets, delivering clear voice to the other party. The voice delay rate is significantly lower than traditional single-ear headsets. It also excels at cutting out surrounding noise, and the weakness of easily falling off has 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 issues with conventional Bluetooth headsets such as unstable communication, power loss, fast battery drain, and interruptions. ・【Mute function & simultaneous connection to two devices】 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. Furthermore, it can connect to two devices simultaneously, allowing you to connect both your work and personal smartphones at the same time. ---------------------------------------