Description de chez Amazon USA : - Shape your sound and eliminate feedback with 7 bands of equalization - This BEHRINGER product has been designed to compete head to head with leading products on the market - Wide frequency range from 50 Hz to 10 kHz with a powerful 15 dB boost/cut per band - Status LED for effect on/off and battery check - Runs on 9 V battery or the BEHRINGER PSU-SB DC power supply (not included)