They work just fine if your 360 is hooked to the TV via HDMI. The only thing you need to know is if your TV has an Audio out port on the back. This would be the Red and White ports. If you don't have an Out port for those then you will have to purchase
this. www.amazon.com/.../B001S5CCF2 That way you can keep the HDMI cable plugged up and have the Headset on at the same time.