Descriptions: Style:Headphone Communication:Wireless Function:Monitor Headphone With Microphone:Yes Is wireless:Yes Wireless Type:Yes Control Button:Yes Volume Control:Yes Active Noise-Cancellation:Ye more→s Features:With Microphone Headphone Pads Material:Soft Foam Power by: 4 x AAA batteries(not included) Features: 1. The wireless headset can wirelessly listen to all channels of TV audio, computers, game consoles, DVDs, VCDs, stereos, MP3s, CDs and other electrical appliances with audio output. (Test result: the effective distance is about 30 meters, and the effect of 10 meters is good). When not chatting, try not to plug in another microphone output line to avoid interference caused by