This item was purchased by mistake and is therefore new and unopened. ・Domestic genuine product, new, with a 1-year manufacturer's warranty ・Product certified with the Technical Regulations Conformity Mark. 　Frequency band: 2.402GHZ-2.480GHZ ・Perfect for Bluetooth earphone beginners. An entry-level model that allows you to easily enjoy JBL sound. 　Durable and tangle-resistant flat cable is used. ・Approximately 16 hours of continuous wireless playback ・Equipped with a 12.5mm diameter dynamic driver ・Equipped with a 3-button remote control with a microphone that allows you to adjust the volume, control music, and make calls