?is transparent・ and the gain knob is fully functional to add some sparkle and a slight boost・ or an incredible overdrive from the pre-amp stage distortion. The <B>Roll Boost</B> also works great in the pedal chain before distortion pedal.<br><br><img src="http://des.chinabrands.com/uploads/2015/201506/heditor/201506181825286822.jpg" alt="JOYO JF - 38 True Bypass Design Electric Guitar Roll Boost Clean Volume Effect Pedal with Aluminum Alloy Material" /><br><img src="http://des.chinabrands.com/uploads/2015/201506/heditor/201506181825287769.jpg" alt="JOYO JF - 38 True Bypass Design Electric Guitar Roll Boost Clean Volume Effect Pedal with Aluminum Alloy Material" /><br><br / ><B><span style="font-size:14px;">Features:</span></B><br>Classic A circuitry・ a flip of the switch gives you up to a 35dB boost.<br>Supports a maximum input of 18V DC voltage.<br>The pedal can also function as a volume limiter.<br>The sound of the roll boost pedal is transparent・ and the gain knob fully functional to add some sparkle and a slight boost.<br>True bypass design・ minimise the tone loss.<br>Running current: 2mA<br>Power: DC 9V                 <strong>Brand:</strong> JOYO <br />             <strong>Model  :</strong> JF - 38 <br />             Array             <strong>Package weight:</strong> 0.255 kg <br />             <strong>Product size (L x W x H)  :</strong> 11.7 x 6.2 x 5.1 cm / 4.60 x 2.44 x 2.00 inches <br />             <strong>Package size (L x W x H)  :</strong> 13 x 7 x 6 cm / 5.11 x 2.75 x 2.36 inches <br />             <strong>Package Contents:</strong> 1 x JOYO JF - 38 Electric Guitar Rool Boost Effect Pedal・ 1 x Bilingual User Manual in English and Chinese