Edifier USA R18 2.0 Multimedia Speakers All MDF wooden enclosed satellites each incorporating 3 1/2 inch by 2 inch full range drivers Magnetically shielded speaker drivers Power indicator and built-in headphone jack on front panel of active speaker Front panel controls for Volume dial and power switch All MDF wooden enclosed satellites each incorporating 3  inch by 2 inch full range drivers Magnetically shielded speaker drivers Power indicator and built-in headphone jack on front panel of active speaker Front panel controls for Volume dial and power switch