1. Five-band equalizer - volume control, presence control, bass control, center control 1, center control 2, treble control, tuner power on/off button. 2. Large Tone and Pickup Range - The complete set provides excellent tone and pickup range and is designed to fit the body of any standard acoustic guitar. 3. Amplify the sound of the acoustic guitar. The 5-segment preamp pickup includes everything you need to add pickups to your acoustic guitar and amplify the sound. 4. Easy to read - LCD display, easy to read. Professional guitar tuner automatic and manual tuning modes. 5. Frequency, power-frequency response: 20Hz-20KHz, power: 6F22 9V battery power supply (not included) Size: 9.8*5. 8*4cmMaterial: plastic metalColor: Black br/