Works great. Great amplified stereo sound. Made by Koss for Nexxtech Separate L/R controls with treble and bass control Headset plug on speaker Microphone passthrough (extends microphone plug from computer) with plug on speaker Plugs into computer or other audio device using a standard 2.5mm stereo jack Each speaker is 7x3.5x4 inches (HxWxD) AC powered (with power adapter) or battery powered (batteries not provided) Contact with a fair price offer to purchase