Used headphones that are in good physical condition with minor signs of use. Included: Headphones, Carry Case, Aux Audio Cable and USB Type-C Charging Cable. Return Policy: Our 100% Satisfaction Guarantee promises that our products have been tested and fully work. We accept returns up to 30 days from delivery. Items just need to be in their original condition and packaging as received. We will apply a 20% restocking fee for returns if there were no issues with the item or if you changed you mind or didn't like them. If you have any issues, please give us the opportunity to resolve your concern. If the item is defective, non working, or does not match description, please contact us for an easy return. Manual can be found at Sony website. Features Active noise cancellation Effectively blocks out distracting background noises, so you can enjoy a focused, immersive sound environment. Rechargeable battery Offers up to 30 hours of use and lasts up to 300 hours on standby mode. Headset touch controls Include volume, play/pause, next song, going back, tap and hold to activate VA, Quick Attention. Built-in microphone Enables simple hands-free chatting via a phone. Bluetooth 4.2 interface with NFC (Near Field Communication) technology Enables simple wireless pairing with your Bluetooth-enabled device. Supports HFP, HSP, A2DP and AVRCP Bluetooth profiles. Over-the-ear design For a secure fit. 3.5mm gold-plated connector Enables use with a variety of audio devices. 40mm drivers Deliver powerful sound. 3Hz - 20kHz headset frequency response Along with a 50Hz - 8kHz microphone frequency response ensures faithful sound reproduction. 50 ohms impedance To efficiently conduct power. Dynamic transducer design For reference-grade audio. Stereo design Delivers crisp tones. 4' cable Permits a flexible range of motion.