I am selling this because I no longer use it. Operation has been confirmed. Instant purchase is welcome. Thank you very much. Model Number YAMAY M98 Specifications Standby time: Approximately 200 hours Bluetooth profiles: A2DP, AVRCP, HFP, HSP Simultaneous connections: Connects to 2 devices Operating temperature: -10℃~55℃ Body weight: Approximately 49.5g Battery capacity: 180mAH rechargeable lithium battery Charging time: Approximately 2 hours Music playback time: Approximately 24 hours Operating frequency: 2.402GHz-2.480GHz Description [Lightweight and Convenient] Weighing only 49.5g and featuring a flexible headband, it can be used comfortably all day long. It frees up your hands, making it suitable for long hours of use for delivery drivers, operators, and business professionals. Comes with a charging base and charging cable, making organization and charging easy. The headset itself has a USB port, so you can charge it directly with a USB cable. [Stable Signal] The signal does not interrupt within a connection distance of 10 meters. You can make calls with ease. (The connection distance is the distance without obstacles. The Bluetooth connection distance will be shorter if obstacles such as walls increase.) [Long-lasting Battery] A 2-hour charge guarantees up to 17 hours of talk time and 200 hours of standby time. [Connect to Two Devices] This headset can connect to two Bluetooth devices simultaneously, allowing for easy switching. Supports calls and music playback. [Compatible Models] The headset itself has Bluetooth 5.0 version and is compatible with smartphones, tablets, PCs, etc. equipped with Bluetooth 2.0 or higher. Android, iPhone, and Windows systems are all supported. For example, Panasonic, Sony, Sharp, Mitsubishi, Samsung, LG, Huawei, Dell, Apple, HP, etc. If your device does not have Bluetooth, you can connect it to a PC with a USB adapter.