ACCURATE& FAST Experience speedy tuning with 1 cent precision. EASY TO READ Deluxe LED display leads clear results of tuning. Improved analog circuit, real signal, no loss of tune. WORK WITH MOST ELECTRIC INSTRUMENTS Work with instruments including seven string guitar or five string bass. SOLID CONSTRUCTION It is make of high-quality zinc alloy, and sturdy. Mini size that save a lot of room on your pedal board. Good Deluxe Tuner Chromatic which is suitable for wide range tuning. LED Light indicator shows the working state, and display leads clear results of tuning. And it's easy to read the right tone. fast precise strobe mode with +/- 0.1% accuracy. Enjoy your own fun and colorful life. Easy to Use Range: 12Hz~4186Hz (C8) Input: 1/4 inch Monaural Jack (Impedance: 100K Ohms) Output: 1/4 inch Monaural Jack (Impedance: 0 Ohms) Power Supply: DC 9V (negative in the center ) Working Current: 90mA Weight: 268g(With box)/Pcs Display Instruction: 1.Step the footswitch to into model, the indicator turn on and keep silent. 2.Operation shows "-" when no signature is input in model, the indicator of solmization and fine tuning be turned on at the same time. 3.The blue indicator in the middle turns on when the tone is accurate. 4.The signature is bypass and no display on the screen while out of the model. colour: Silver Material: Zinc alloy size: 9.5 * 4.5 * 4.8cm Package Contents: 5 * Guitar Effect Pedal 5 * User Manual(English) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.