New, Unused Shipped Anonymously. Plug specification changed from silver to gold plating. Effective in reducing ground loops (buzzing, humming sounds, etc. when multiple devices are connected) between audio sources and receiving devices. Easy connection, just insert it between the device and speakers, etc. Brand: Kebidumei Audio Input: Stereo Frequency Band: 20Hz～20kHz Interface: 3.5mm Main Material: ABS Color: Black Size: Body approx. 62 x 21 x 15mm, Cable approx. 160mm Scheduled to be shipped via Yu-Packet Post Mini from Yu-Yu Mercari. Thank you.