Hign-concerned Chemical : None Material : Ceramic,ABS Sound Isolating : YES Category : Earphones & Headphones Features : With Microphone,Active Noice Cancelling,Dual Connection Waterproof : No Plug Type : Line Type Active Noise-Cancellation : Yes Volume Control : Yes Control Button : Yes Vocalism Principle : Hybrid technology Wireless Type : bluetooth Communication : WIRED Style : In-ear Certification : CE,RoHS Origin : Mainland China