Features: Analog Delay gives you  mild and mellow circuit delay effect.  3 adjustable knobs: Time: adjust delay times; Repeat: adjust delay repeat times; Mix: adjust the contrast proportion.  True bypass design to minimize the tone loss.  Heavy duty switch with all metal casing.    Specifications: Color:Green;  Material:Aluminum alloy;  Delay time range:600MS-3000MS (millisecond);  Input impedance:1M;  Output impedance:1K;  Running current:40mA;  Power:6F22 9V battery / DC 9V adapter (Neither included);  Item size:11.7 * 6.7 * 5.1cm / 4.6 * 2.6 * 2.0in;  Item weight:205g / 7.2oz;  Package size:13 * 7.5 * 6.2cm / 5.1 * 2.9 * 2.4in;  Package weight:245g / 8.6oz;    Note: This unit is without battery, put on the battery by opening the back cover with a screw driver.  Please use the 9V power adapter whose polarity is positive pole outside and negative pole inside.     Package Included: 1 * Joyo JF-33 Analog Delay;  1 * User Manual