【Product Name】 Sennheiser HD 450BT Wireless Headphones 【Color】 Black 【Size】 Over-ear type 【Condition (out of 10)】 10/10 (New, Unused) 【Purchased From】 Mass retailer 【Product Description】 This is the popular Sennheiser "HD 450BT" model. In addition to the traditional Sennheiser sound, it achieves high sound quality with apt-X codec and AAC codec support. It boasts a stable connection with Bluetooth 5.0 & Class 1, and can simultaneously standby for smartphones and PCs with the multi-point function. The noise-canceling function is natural, reducing noise without damaging the quality of voices and instruments. It supports apt-X LL, which has low latency during movies and games. It can be used continuously for 30 hours with a charge of about 2 hours, and also supports fast charging via USB Type-C. It is foldable and convenient for carrying. It also supports voice assistants such as Siri/Google. 【Specifications】 ・Dynamic closed-back ・Sensitivity: 108dB (1kHz/0dBFS) ・Frequency response: 18〜22,000Hz (-10dB) ・Weight: Approximately 238g ・Bluetooth 5.0 ・Certified with Technical Regulations Compliance Mark (uses 2.4GHz band) ・With noise-canceling function ・USB-C charging cable included 【Notes】 Although it is a new and unused item, please refrain from purchasing if you are sensitive to items stored at home. Returns are not accepted to prevent replacement.