ACCURATE& FAST Experience 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 string bass.SOLID CONSTRUCTION It is make of high-quality zinc alloy,durable and sturdy. Mini size that save a lot of room on your pedal board.Good Deluxe TunerChromatic 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. New fast precise strobe mode with +/- 0.1% accuracy. Enjoy your own and colorful life. Easy to UseConnected with power and audio cable, Deluxe Tuner will go to bypass mode. Press bypass switch to enter tuning mode. Operation shows black when no signature is input, the indicator of solmization and fine tuning will be turned on. The blue indicator in the middle turns on when the tone is accurate. Tonal Range: 12Hz~4186Hz (C8)Input: 1/4 inch Monaural (Impedance: 100K Ohms)Output: 1/4 inch Monaural (Impedance: 0 Ohms)Power Supply: DC 9V (negative in the center )Working Current: 90mAWeight: 268g(With box)Display Instruction: 1.Step the footswitch to into tonal model, the indicator turn on and keep silent.2.Operation shows "-" when no signature is input in tonal model, the indicator of solmization and fine tuning will 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 tonal model.colour: SilverMaterial: Zinc alloysize: 9.5 * 4.5 * 4.8cmPackage Contents: 1 * Guitar Effect Pedal1 * User Manual(English)Only the above package content, other products are not included.Note: Light 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.