Thank you for viewing. I also have a set of 2 for sale, so please take a look if you're interested. I prepared a good one for the relevant employee for remote work, but the remote work itself has disappeared. I will sell it to someone who can use it. Some people used it for games. It's sold at Yodobashi Camera for "4,160 yen". Please check the manufacturer's HP for detailed specifications. Thank you. Excerpt from the HP below 【 Features 】 ● Wireless connection…Easy connection with computers, smartphones, tablets, etc. via Bluetooth. ● Compatible with both left and right ears…Adopts a dual-directional microphone that picks up voices clearly and suppresses surrounding noise. The microphone arm swings up to approximately 260°, allowing it to be worn on either the left or right ear. ● Up to approximately 30 hours of continuous talk time…Rechargeable (dedicated charging cord included), allowing for up to approximately 30 hours of continuous talk time (when fully charged). Standby time is also up to approximately 250 hours, significantly reducing the hassle of charging. ● Easy operation on the ear…With the 3 buttons on the ear (housing), you can turn the power on/off, answer calls, adjust the volume, play/pause, skip operations, etc. ● Detachable wind screen…A urethane wind screen is already attached to the microphone. It is detachable and can be washed with water. ● Lightweight 50g 【 Specifications 】 ■ Power supply: DC5V (USB power supply: microUSB input terminal) ■ Built-in battery: Rechargeable lithium polymer battery (3.7V 250mAh) ■ Charging time: Approximately 2 hours (from zero to full charge) ■ Continuous usage time: Up to approximately 30 hours (50% volume) ■ Continuous standby time: Up to approximately 250 hours ■ External dimensions: Width 163.2 x Height 142.2 x Depth 48.5mm (when minimum extension) ■ Type: Dynamic type (monaural) ■ Driver unit: Diameter 30mm ■ Frequency band: 20～20000Hz ■ Impedance: 32Ω ■ Maximum permissible input: 30mW ≪Bluetooth section≫ ■ Communication method: Bluetooth standard Ver.5.1 ■ Supported profiles: HSP, HFP, A2DP, AVRCP ■ Supported codecs: SBC, AAC ■ Frequency band: 20～20000Hz