I am selling these headphones because I have only used them a few times and they are in good condition. * There is a small crack on one of the ear pads. * These are from the first generation, but it seems that the only changes are in the functionality, and the appearance and sound quality are almost the same. * There is no instruction manual. Please check online. * Please refrain from price negotiations. Thank you. The following is a product description: Enjoy music with superior sound quality in a quiet environment thanks to the industry's best noise-canceling function. Bluetooth and NFC allow wireless connection to your devices. Optimized EQ delivers balanced audio performance regardless of volume level. Equipped with a lithium-ion battery that allows for up to 20 hours of wireless enjoyment on a single charge. The dual-microphone system with noise-canceling function enables clear voice calls even in windy or noisy environments. Lightweight and high-quality materials allow for comfortable wearing all day long. The Bose Connect app allows you to manage paired devices and operate them freely. Product Information: Standard Package, Black Batteries: 1 Lithium-ion battery (included) Product Model Number: QuietComfort35 WLSS BLK Is Discontinued By Manufacturer: No Color: Black Battery Type: Lithium-ion Charging Time: 2.25 Hours #Bose #BOSE #Bluetooth #Headphones