Sony Wireless Digital Surround Headphone Black [Refurbished] 9.1ch System, Closed-Type, MDR-HW700DS,

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. Accessories: AC adapter, optical digital connection cable (1.5m), micro USB charging cable (1.5m), instruction manual Type: Sealed dynamic type Driver unit: 50mm diameter dome type *2 Magnets: Neodymium magnets Frequency response range: 5Hz-25,000Hz Impedance: 24 Ω (1KHz) Power source: Built-in lithium-ion rechargeable battery (DC 3.7V) Charging method: USB charging A digital surround headphone system that lets you enjoy movies and other content with incredible impact. 9.1 3D VPT (Virtualphones Technology) reproduces a three-dimensional surround sound field. A digital surround sound headphone system that lets you enjoy movies and other content with incredible impact. It can be charged exclusively via USB, and a full charge of about 3 hours provides about 12 hours of playback, while a 30-minute charge provides about 2 hours of playback. World's first (*) 9.1ch 3D VPT (Virtualphones Technology) reproduces an immersive surround sound field. The basic 5.1ch configuration for movies is enhanced with four additional channels: surround back to represent sounds from behind and front high to add height-direction sound. The 9.1ch surround sound field enhances the sense of depth, reproducing powerful content with a rich, immersive experience. New DSP platform A new platform utilizing two high-performance DSPs with a maximum computing power of 2.4 GFLOPS (*) allows for: It achieves 9.1ch surround sound, reproducing the sound field in both the height and depth directions. Dual-band wireless transmission system that minimizes audio interruptions It uses both the 2.4GHz band, which is less affected by obstacles, and the 5GHz band, which experiences less radio interference. When the 2.4GHz band is congested, the device automatically switches to the 5GHz band before radio interference occurs. Audio Return Channel (ARC) When you connect a TV that supports Audio Return Channel (ARC) to this processor using an HDMI cable, the TV's digital audio signal is transferred to this unit. You can enjoy TV audio with just one HDMI cable, without needing to connect the optical digital cable that was previously required.