Features The Joyo JF-33 Analog Delay gives youmild 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: Model: JF-33 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 Package List: 1 * Effect Pedal 1 * UserManual (English & Chinese) Note: This unit is without battery, put on the battery by opening the back cover with ascrew driver. Please use the 9V power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.