Black over-ear wireless headphones. - Brand: Sennheiser - Color: Black - Type: Wireless headphones - Design: Over-ear Sennheiser wireless headphones bluetooth HD 450BT black noise canceling low latency AAC aptX-LL Bluetooth 5.0 voice assistant cooperation Smart Control App [Domestic genuine product] In addition to the traditional Sennheiser sound, it supports the apt-X codec, providing high-quality reproduction, and also supports the AAC codec, allowing iPhone users to enjoy high-quality sound. This is a brushed-up model of the HD4.50BTNC, which has won the domestic authority VGP award. Sennheiser's well-regarded and natural noise canceling reproduces music naturally without compromising the quality of voices and instruments. Supports Apt-X LL codec, making it less likely for audio to lag during movies and games, providing a stress-free experience. Bluetooth 5.0 & Class 1 are adopted for stable connection performance. Multi-point support allows simultaneous standby with work and private smartphones and PCs. Battery life for peace of mind during commuting and travel: 30 hours of continuous use with a 2-hour charge. USB Type C is used for the charging cable, allowing for quick charging. It can be folded compactly, allowing you to enjoy music anytime, anywhere. Hands-free calling is possible. Voice assistant supports Siri and Google. ・Dynamic, closed type ・Sensitivity: 108dB (1kHz/0 dBFS) ・Frequency characteristics: 18-22,000Hz (-10dB), mass: approx. 238g, product certified with the technical suitability mark. Operating frequency band: 2.4GHz USB-C charging cable