AKG Y500 WIRELESS Wireless Headphones Black Can be used both wirelessly and wired. Operation confirmed. There is discoloration on the ear pads. No other noticeable scratches or stains are found on other parts. Box and all accessories are included. Only the audio cable has been used. ■ Wireless Headphones ■ Type: Dynamic, Closed-back ■ Bluetooth Version: Bluetooth 4.2, Class 2 (Communication distance 10m, without obstacles) ■ Supported Profiles: A2DP v1.3, AVRCP v1.5, HFP v1.6 ■ Supported Codecs: SBC/AAC ■ Frequency Response: 16～22,000Hz ■ Sensitivity: 92dB/mW ■ Impedance: 32Ω ■ Weight: 230g ■ Charging Time: Approximately 2.5 hours ■ Music Playback/Talk Time: Approximately 33 hours ※ When Bluetooth is on ※ Charging and playback times may vary depending on the usage environment. ※ Supports quick charging (approximately 1 hour of playback with about 5 minutes of charging) ■ Included Accessories: All included