Aguilar OBP-2SK Onboard Preamp<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Wire lead length: 6.50 inches，Low noise discrete FET input stage， center detent 50 K linear pots，with a dual concentric pot available. </span></li><li><span class="a-list-item"> Bass control:+/-18dB bass at 40Hz </span></li><li><span class="a-list-item"> Treble control:+/- 16dB treble at 6.5kHz </span></li><li><span class="a-list-item"> Includes stacked Treble/Bass pot. </span></li><li><span class="a-list-item"> Battery life: 324 hours，Wired up with one 9V battery， it will fit into just about any instrument </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41EesjF2QfL.jpg" noproxy>