the Lenovo Go Usb-c Anc In-ear Headphones Are Designed To Deliver Clear Voice And Maintain Productivity While On The Go. Not Only Do These Headphones Produce Superior Sound, They Also Feature 3 Microphones That Ensure Clear Voice For Calls. Lightweight, Highly Portable And Perfectly Comfortable, The Lenovo Go Usb-c Anc In-ear Headphones Also Offer A Multi-functional Control Box For Easy-of-use.