Sony MDR-1ABT (Black) High-Resolution Audio Wireless Stereo Headset with Bluetooth NFC (Japan Import) Maximum input: 100mW Type: headband, Stereo / Mono: Stereo, structure: sealed, noise-canceling: non-compliant Surround: non-compliant, wireless: Bluetooth, Interface: mini plug (3-pole) / Bluetooth Frequency band (L): 4Hz, frequency band (H): 100000Hz Japan Import with Japanese Manual