Chemicals related to Hign - None Material - ABS Maximum Wireless Range [m] - 10m-20m Sound Isolation - YES Category - Earphones & Headphones Charging Method - Charging Case Driver Diameter - 13mm Impedance Range - Up to 32Ω Bluetooth Version - 5.2 Features: Waterproof, with Microphone, Active Noise Cancellation Codecs - AAC, SBC Microphone - Yes Wireless - Yes Waterproof - Yes Line Length - 0m Frequency Response Range: 20 - 20000Hz Sensitivity - 56dB Functions: For Internet Bar, for Monitor Headphones, for Video Games, for Hi-Fi Headphones, for Sport, for Outdoor, for Swimming, for DJ, for Study Active Noise Cancellation - Yes Volume Control - Yes Control Button - Yes Vocalism Principle - Hybrid Technology Wireless Type - Bluetooth Communication - Wireless Style: Wired In-Ear Headphones Certification - CE Origin - CN (Origin) Brand - Redmi Gifts - Lanyards Features - With wireless charging Other Features... Noise Cancelling *Imported from overseas There may be small scratches or stains. Please understand. Instructions are not written in Japanese. Other Features... Noise Cancelling