Sony MDR-HW700 Wireless Digital Surround Headphone for MDR-HW700DS (Japan Import)
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<b>[Product Information]</b><br>
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<li>Driver unit: φ50mm Playback frequency: 5Hz-25, 000Hz</li>
<li>Impedance: 24Ω Power supply: Built-in Li-ion rechargeable battery (DC3.7V)</li>
<li>Charging time: 3 hours Charging Method: USB charge</li>
<li>Battery life time: 12 hours Weight: about 320g</li>
<li>Accessories: None</li>
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